All prison terms are the same: 7 days. However, I believe you should get options for bribing the guards (and other normal prison options) after a day has passed.
Being captured by rogues is inherently less interactive than being captured by humans, because there's no Judge or anyone actually monitoring you. There are no plans to change this.
Yes, sometimes things happen to you in BattleMaster that suck. That's part of life, and part of the game.