Hmm weird. With 10 in all stats and getting the schedules from those 3, the chances of success for each option should be 75%/90%/75%. Check to make sure you've done it correctly, and that your stats aren't being reduced by your states!
I'll consider it, but obviously have to weigh it against putting in new content, as well as whether I should be asking players to have to do a NG+ to play through that again. There's an immense lot else to do after all!