Please note that we've updated the Mount & Blade II: Bannerlord save file system which requires you to take certain steps in order for your save files to be compatible with e1.7.1 and any later updates. You can find the instructions here.
This thread is firstly a suggestion for the general skill levelling system which in my opinion defies logic and secondly explains how roguery is currently broken.
Firstly, the levelling progression of a perk slows down according to your characters level. So if your character is level 1...