Sure it could work. Even so-called "worldly people" have respected that marriage arrangement in certain cases. The "devout" JW marriage success record is no better, maybe worse.
And honestly we must see JWs today are now becoming proponents accidentally from guidance of purposeful leaders providing valid lawless evidence that is:
(2 Peter 2:1-3) However, there also came to be false prophets among the people, as there will also be false teachers among you. These very ones will quietly bring in destructive sects and will disown even the owner that bought them, bringing speedy destruction upon themselves. 2 Furthermore, many will follow their acts of loose conduct, and on account of these the way of the truth will be spoken of abusively. 3 Also, with covetousness they will exploit you with counterfeit words. But as for them, the judgment from of old is not moving slowly, and the destruction of them is not slumbering.
THAT is wat the Bethel of today is, reproachers at global scale. And it is policy now.
Thus marrying a "devout" JW in today's Bethel system is marrying a member of the actual apostasy which is in JWs by clearly a 37 year pattern under add-on, non-Biblical "Governing Body" dictatorial power. In effect the modern papacy of Bethel is what is actually in power "in the truth" and that is why "you will know these men by their fruitage" is growing in public view on the now dead tree of Bethel and the GB collective "pope" "body".
So if one flees the main apostasy (Matt24:15 with also UN NGO evidence), and sticks to God, Christ, the Bible and UNDESERVED KINDNESS first, a marriage in such a state of spiritual transition preceding a "Jerusalem" judgment again, can work. Because if one truly repented, and on truly endeavored to obey the love and mercy commands, God would aid the union because God cannot be fooled if we are trying to serve him or we are not.
In spite of Bethel organized lies, there is still God, there is still Jesus Christ and there is still actual truth in the Bible. Bethel's leadership is the problem of the blind now leading the blind JWs.
A "fader" may actually have a far greater spiritual discernment than a whole elder body and governing body that now accepts even UN Bethel dedications as no big thing. Many faders are the actually spiritually strong, as no robot sheep in JWs is actually following Christ and God any longer, nor do the LISTEN to the Bible, they listen to non-anointed frauds in a modern papacy of Bethel above the commands of God.
(Matthew 15:7-11) you hypocrites, Isaiah aptly prophesied about you, when he said, 8 ‘This people honors me with their lips, yet their heart is far removed from me. 9 It is in vain that they keep worshiping me, because they teach commands of men as doctrines.’” 10 With that he called the crowd near and said to them: “Listen and get the sense of it: 11 Not what enters into [his] mouth defiles a man; but it is what proceeds out of [his] mouth that defiles a man.”
Now God and Christ are stating that to JWs, but JWs only hear Bethel ear tickling that everything is AOK. You are better off with a fader, than with a JW heading rather into judgment (Matt24:15; Dan8:13-14), and great disappointment, because when the GB and Bethel pay the divine bill of God's accounting, JWs focused on those fallible idols and organizational idol, will be greatly stumbled when those sinful men go down as an organization.
(JWs have had their faith diverted and diffused from God and Christ unto human "bodies" as idols God will smash, and in that demolition JWs focused on these organizational idols will have their misdirected faith onto men, also smashed.)
(Jeremiah 17:5) This is what Jehovah has said: “Cursed is the able-bodied man who puts his trust in earthling man and actually makes flesh his arm, and whose heart turns away from Jehovah himself.
And they will, because it is plainly foretold in prophecy and principle, Bethel is lawless and reproaches God's name in a self-proclaimed covenant with him, and no people in history ever got away with transgressions of these magnitudes, with out a divinely selective judgment on the "wheat" and the "weeds". And the problem is, Bethel is the main weed patch and seeding system.
Faders, not the congregational leaders and zombies, are the ones clearly beginning to realize this, and that it's implication is Bethel going down like Jerusalem, for the criminal lawlessness in organized and self-justified fashion. It is the same old story, just repeating in JWs as blind as any Jew in Jerusalem for the most part, a few will make it out to tell the story later. It is all simply repeating right in JWs.