oh I found some bugs:
-when exchanging crimson beherits, either one of the stat upgrades or the ultimate equipment (I'm not sure which it is), all of the crimson beherit exchanges become free.
-I also got a bug involving muldoon, that I couldn't replicate. I believe I either purchased or hit shift on a certain item, and after exiting that hunting trade menu, the error popped up and took me out of my game to main menu.
-I can also confirm that talking to diannyn near end-game does indeed reset the status of the "paladin of eridwell" cirrus quest. luckily it doesn't seem to do anything other besides changing the completed mission count in the statistics menu.