Have only observed few of the bugs described in this thread after starting 1.3.0 new campaign 5-6 hours ago. Villagers are fine in my game and I have not experienced any stuttering when enemies retreating from the field - but that may be due to me still being in hobo phase and only battling occasional bandits.
One bug that I have is sometimes companions in taverns have wrong encyclopedia articles linked to them but that is it.
I have disabled most of the mods I had and the AI, at least in tournaments, seems OK to me. Just battled a fian legend and he tried to feint me 3 times and parried most of my strikes - it was epic!
Edit:
I was wrong about the villagers, just noticed 3 groups of them idling.