I ended up installing http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=815, which when combined with MCA and CoM transforms Seyda Neen from a sleepy little dock town to something on the verge of crowding. Still, I picked up Juib and decided to hit the Bandit Cave for some more loot to sell in Balmora (As I'd tapped the trader in town out of his funds). MCA backfired in there a bit (Spawned a Thug with a Magic Sword), but worse...Juib didn't attack unless I initiated combat.
I can understand the reasoning behind it (So your companions don't go running into the Line of Fire), but I really wanted to play a more pacified role this time through. So is there a Companion Mod out there that reacts when I'm either struck or when an enemy comes near? I noticed http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=2005 (Which sort of fits the style of a wandering Merchant), but it doesn't do me any good if I've still got to be in the vanguard of any sort of violence.