For instance, when saving the guildmaster's son for a fighter's guild quest in OB, I was probably around level 35 or so and my entire crew was wiped out in the first room of the cave, followed by the kid getting knocked out literally 25 times before we got out. This was not only ridiculous because he couldn't compete with the enemies (that only I could handle), even though he was a "trained warrior", as well as the fact that he should have been dead, ending the quest or making me try again with another save. Furthermore, this is a perfect example of stupid AI. The kid would simply go running from room to room in front of me getting owned, and I had no control to either command or save him due to his behavior.
Point being, Skyrim better address the issues with both essential and non-essential NPC behavior, functionality, and PC commands, or I'll just end up lonewolfing through the whole game like OB. And not in the good stealthy way.