I'm taking up the game again after years away. I don't remember what the version I played last was. Starting a new game from scratch, and I'm just starting act 3, which is all brand new stuff for me, there were only 2 acts from before.
Anyway, I hadn't done everything everything before pulling the trigger at the Church; there were a few upgrades to properties I hadn't gotten yet (like the Marina one) I hadn't taken everyone to the beach, little things like that. I did make a backup save before going into the church, so I can go back relatively easily, but is there anything that is non-obvious that will lock me out of stuff in act 3 if I don't do it in act 2?