Latest response from support. Any other questions for them?
1. There is no bump for an undefeated season other than just a better outcome for not having any losses.
2. Coaches and Press use basically the same factors but weight them a little differently.
We did a little clean up work on SOS a couple updates ago, but the whole ranking process is something we really want to review and revamp. After the engine update, with the addition of position role formulas, we should be able to tap in to some better player and team evaluations. This should allow us to work on a better ranking system, but that most likely won't happen until some time after the update.