Great idea for a series.
On this one I would go a different way. I would agree that Acts 15 is unequivocal that christians must abstain from blood. I would focus on context to establish how early christians would understand that decree.
Briefly...
1 - Acts 15 was about a dispute in the early church. Did gentile christians have to get circumcised and keep the law?
2 - The final decision was that they did not but in order for gentile and Jewish christians to enjoy fellowship - and not hinder the good news - there were a few "necessary things" to be observed.
3 - These necessary things were the same things non-Israelites had to observe when sojourning in Israel in OT times. Fornication (especially forbidden marriages), Idolatry and blood
4 - If we examine the Law on blood in the OT we find that it only related to killing an animal for food. If a beast was found "already dead" it could be eaten unbled with impunity. Moses even encouraged Israelites to sell such beasts to non-Jews. Blood represented the life that had been taken and which had to be returned to the life-giver. Since nobody gives their life to donate blood the decree to abstain from blood does not apply.
This also explains why the "necessary things" do not include murder, rape and theft. Jews and non-Jews share a taboo regarding these things.