I've been testing this 1.6 with a dwarf wyrmic and after completing all the low tier dungeons + the one with the experiment thingy attacking a yeek so far i didn't noticed anything really different from the AI, but it's been a long while since i played the game solo (i mean without using the party addon to get team members) so i don't really remember how the AI reacted to you alone.
What i noticed though now that i reached level 17 is that talents/skills seems to have more additional bonus in them than before, probably making the usual unused (or useless in comparison to other) talents/skills more interesting to take then for more of their bonus synergy.
But i'm far from being used enough to wyrmic to tell if it make the gameplay with them really changed in comparison from before this 1.6
edit : i think i noticed a new AI thing , it occured in the village that get invaded by storm elementals , a big one that was at a distance started to shoot thunder at my character that replied with breathing a few attacks, the storm elemental instead of continuing the assault just ... ran away out of my visual range.
Later he came back, then ran away again so i had to run after him.
Well i hope it's not going to be a regular "tactic" the more i will progress, considering how much monsters there are in dungeons, i don't imagine running after fleeing monsters being very fun.