Charisma or other stats have very little influence on dice rolls, if any at all. Maybe it's just bugged, and the logs doesn't show anything about these rolls (just fight related), so remains a mystery.
It's all about just a nice random dice roll and then good luck the next playthrough, if you intend to replay it ever, otherwise you either reload or have to enjoy the failure. No other way for now.
It would be nice to see how stats actually affect a dice roll. I have also noticed while reloading that I have gotten different roll requirements for the same object under the same circumstances, so either something must definitely be bugged.
No do not take rolls out of the game, it's a d&d game. I don't really care if I miss something when I play, if it really bothers you just reload.
My suggestion is not to take rolls out entirely. What I don't understand is what warrants a roll and what does not? When does a task become, or is considered, so trivial that it does not require a roll?
