1. Not actively working on any changes right now, but that is because I have been perfecting the ncaa 14 set.
2. I strongly suspect that the coach sliders have an impact on the game. Unfortunately, we can't edit them in the roster file like on NCAA 14. So, if I plan on playing like the real life team does, I use their coach. If I am going to use my own scheme, I create my own coach and set the sliders based on how I plan on playing.
3. Not locked in yet, but I usually use monthly during the season and weekly during the preseason. I hold myself to whatever I set the CPU to.