Was nothing wrong with Bison,
in all fairness Bison was a good leader didn't take shit, and the faction was running great with him as right hand.
Bare in mind that Bison helped relaunch The khans, promoted people to be overlords ect.. with his wisdom the khans where great. he took a lot of shit of people and dished it back, he always had the khans back no matter what and in my eyes made them what they are today so a lot of my respect goes with Bison.
regards to Sven,
there was no better option then for Sven to have this role, hes a great guy has leadership skill in my eyes no man was better to receive this honor then him.
Sven will also do a great job i am sure of it.