Update 2017-07-29 (1): If anybody’s interested, here’s an AiG article on the ‘topical parallelism’ of creation days that Paul brought up (spoiler: it’s there on a surface read but the devil is in the details, as always; also like we discussed there’s no saying you can’t use various literary devices in different kinds of literature, even historical, it doesn’t take way from it): https://answersingenesis.org/blogs/ken-ham/2011/12/10/its-not-so-parallel/

Update 2017-07-29 (2): I also didn’t know where to go with the point made about Christ needing to be a blood-relationship to a real Adam versus Christ atoning for our sin (we all sin, no Adam needed) or atoning for our sin nature (from Adam, so blood relationship required). In evolution, there’s no first Adam so we’re not blood related so biblically the kinsmen redeemer idea doesn’t work (so did Jesus act do anything?) But if Jesus only died for our sin acts then maybe a first Adam isn’t needed anyway. I don’t have a solid answer, it’s worth some googling, but apparently it has to do with Original Sin (sin nature) vs Imputed Sin (Adam’s sin is “credited” to us). The first is dealt with by the Holy Spirit through sanctification over time, the second was dealt with by Christ’s righteousness being credited to us (so would require a real first Adam for it to make any sense). http://www.desiringgod.org/articles/what-is-the-difference-between-original-sin-and-imputed-sin

Update 2017-07-29 (3): Btw, I don’t pretend perfection in understanding all this is achievable, but I just love how when you go digging usually you find these things have already been covered and they fit right in.