Imoen adventurer kit trades in backstab modifier for +20 to detect trap and open lock... except her starting values for those 2 things in BG2 are 95 and 100 respectively. And from what I have been reading online, that is high enough for everything you would ever encounter in the game.
I would suggest that when this option is enabled, that you redistribute 20 points away from open lock and 15 from detect trap. Getting both of these to 100 exactly and putting the spare points somewhere useful
Edited by taltamir, 26 September 2013 - 10:04 PM.