Ulrich hasn't seen very much play, and what play he has seen has been character driven and not too strongly numbers driven. Given the choice between keeping the character or exiling him from the saga, I'm erring on the side of keeping him in the saga, if there's enough interest. If things have to change and players involved can agree, and the troupe as a whole doesn't object, it's not a big deal, IMO.
Ulrich started out as an apprentice for a character/player that never went anywhere. PB stuck around, for some reason. 
I'd rather provide a player with an opportunity to retool his character than make him wrestle with a hamstrung character concept that is a mess because he had too many masters and went in too many directions. Not everyone wants to play a character that isn't good at anything, or had a messed up apprenticeship, such as Talia, my maga in PB's saga.