As I have told before, one turning point in my exit from the WT was a conversation with a close friend about the "ransom".
We were in the (French) Bethel library, I don't remember what we were talking about until she said to me: "You know, I never understood why Jesus had to die for us." This surprised me so much that the only reply I could offer consisted in reciting the WT theology which she, of course, knew as well as I did. And as she kept smiling at that I began to understand what she meant by "I never understood".
This was the first in a series of conversations which led us very far from WT theology and started me reading the NT again from a completely different perspective.
This basic question ("why Jesus had to die") is central to Christianity and, when you actually read the texts, already produces dozens of (slightly to wildly) different "answers" in the NT itself, not to mention later theology.
However popular religion does not work with multiple or complex answers but with unique and simple ones -- the variety of which constitutes the complexity as they add to and combine with each other in "history," i.e. in memory and writing. So the complexity must be simplified and reduced over and over again to "work".
We are all familiar with the WT reduction of the "ransom" doctrine, illustrated by the "scales" picture: Jesus = "perfect man" = Adam; it is unscriptural (the parallelisms of Adam and Jesus in 1 Corinthians 15 and Romans 5 are antithetical, they are not about ransom or even substitution; neither Adam nor Jesus are called "perfect," etc. It poses a number of logical difficulties within WT theology (the scales are not as even as they look on the picture, if you take into account the preexistence and resurrection of Jesus on one side, the role of Eve, the exclusion of Adam and Eve themselves from redemption, etc.). But more importantly, when you actually read the NT you cannot miss the fact that there is much more to the NT interpretations of Jesus' death (and resurrection!) than the commercial notion of "exchange value," and "recovering what has been lost" -- although the concept (metaphor?) of "ransom" is found as well among many others.
After leaving the JWs I associated for some time with an Evangelical church, and found out that popular Evangelicalism also rested on similar though different reductions under the general concept of substitution. The "simple answer" there is, generally, "Jesus suffered/died so that I may not suffer/die." Although the "prooftexts" for this view are mainly Pauline, the summary implies a gross reduction of Paul's own theology, where Jesus' death is inseparable from resurrection, the collective notion of his resurrected "body" as the church, to which the individual is introduced through baptismal initiation (and repeated Eucharist) which also implies his "death" (Romans 6), as well as a cosmic horizon (redemption of the whole creation). The 8th chapter of Romans is often quoted, but the qualification in v. 17 is rarely mentioned: "and if children, then heirs, heirs of God and joint heirs with Christ--if, in fact, we suffer with him so that we may also be glorified with him." The "economy of suffering" implied in (post-Pauline) Colossians 1:24: "I am now rejoicing in my sufferings for your sake, and in my flesh I am completing what is lacking in Christ's afflictions for the sake of his body, that is, the church" is rather embarrassing to the Evangelical view and, in fact, very rarely quoted if not to be explained away. Not to mention the role of the "cross" theology in the Synoptic Gospels as bearing one's cross after Jesus.
Tuesday's recent thread reminded me of my experience in speaking about JWs to an Evangelical audience (about twenty years ago). A couple of times I had to explain the JW "ransom" doctrine to groups of Evangelical pastors and leaders and it brought some embarrassment: they actually found the "scales" illustration clever but failed to understand how it was "wrong"! I remember one hearer asking me: "but isn't that basically what we believe, too?"
My point is that the notion of "salvation" in the NT implies a complex and open network of interpretations and rationalisations (of which the diversified notion of redemption through the death and resurrection of Jesus Christ is only a section*). Making it a "simple doctrine" again is probably necessary for any Christian preaching to be popular, but it cannot be done without a measure of reduction of the NT material, which can be compensated by a measure of interpretive creativeness, as has often been the case in the history of theology. For instance, Anselm's feodal pattern in Cur deus homo (why did God become man?) was very different from, and not strictly more "scriptural" nor less reductive than the WT or Evangelical interpretations, but it was helpful to his historical context. Imo there's nothing wrong in the process, provided we don't lose sight of the fact that any interpretation is just another in an already complex and still growing network. Neither the first nor the last nor the only one.
* Here is fwiw a non-exhaustive list of NT interpretative schemes of Jesus' death and resurrection I have already posted earlier somewhere:
Condemnation and vindication of the righteous Mc 14—16//; Ac 2.24,32; 3.13ss; 4.10s; 5.30; 7.52; 8.32s; 10.38ss
Test and qualification Hé 5.7ss; 12.1ss
– Access to the right hand of God Mc 14.62//; Ac 2.33; Hé 1.3,13; 1P 3.22
– Access to the status of Lord Ac 2.32; Rm 14.8; Ph 2.8ss; cf. Mt 28.18
Revelation of the Son Ga 1.16
– Raising and glorifying of the Son of Man Jn 3.14ss; 12.32s; 13.31s; 17.1,5
– Constitution of the Son of God Rm 1.3s
Fight against evil, apparent defeat and victory Jn 14.30; 1Co 2.8; Col 2.15; cf. Mc 8.33//; Lc 22.53
Jesus’ will Jn 10.17s; 17.19; cf. Mt 26.53s
God’s will Ac 2.23; 3.17s,21; 4.11,25-28; 8.35; 13.29
According to the Scriptures Mc 14.21,27,49//; Mt 26.54; 27.9s; Lc 22.37; Jn 19.28,31-37; 1Co 15.3s
Strength of weakness, Wisdom of folly 1Co 1.18-25; cf. 2.2; 2Co 13.4; Ga 3.1
Proof of God’s Love Rm 5.6-8; 8.32; 1Jn 4.9ss
Saving deathFor many Mc 10.45; 14.24//
For all 2Co 5.14ss; 1Tm 2.6
For his own Jn 10.15
For sins 1Co 15.3-5,17
– Atoning Sacrifice Rm 3.25s; 1Jn 2.2; 4.10
– Paschal Lamb Jn 1.29,36; 1Co 5.7; 1P 1.18s
– Redemption and liberation Mc 10.45//; 1Co 6.20; 7.23; Ga 3.13; 4.5; 1P 1.18s
– Vicarious punishment and grace 2Co 5.21; Ga 3.13; 1P 2.21-25; 3.18-22
– Condemning sin Rm 8.3; cf. 5.19
– Justifying the sinner Rm 4.24s
– Intercessing for the guilty Rm 8.34; cf. Lc 23.34
Validating the covenant Mc 14.24//; Hé 8; 9.15-20; 10.29; 12.24
Reconciliation of the world 2Co 5.18ss
Founding the Church Ep 1.20-23
Firstfruits of the general resurrection Mt 27.51ss; 1Co 15.20; 2Co 5; Col 1.18; 1Th 4.14ss; Ap 1.5
An example
Die to the old and live to the new Rm 6.1-11
Die to the earthly and live to the heavenly Col 3.1-4
Die to oneself and live to Christ 2Co 5.14ss
Die to oneself and live to others 1Jn 3.16