For me, I'm crashing during an optional fight with demons that are protecting a chest. I have a feeling it's one of the new ability upgrade toggles causing the issue. It might very well be Lunge & Slash like another mentioned, because I have two warriors in my group (my Inquisitor and Cassandra), both of whom have the ability, and one of whom has the new upgrade toggled on for it. The only problem with that theory is that my first fight using the new upgrade toggles didn't cause me to CTD, so I either got lucky and didn't use the bugged ability, or something else is causing the issue.
EDIT: I reset every toggled upgrade back to their original default upgrades and haven't had another CTD yet. Considering how many abilities now have upgrades you can toggle between, it could be any one of them, or more than one. If you toggled *any* of the ability upgrades, put them back to their originals and see if you still crash during fights.
As for CTDs outside of fights, I have no idea what could be causing those, because I haven't experienced any.
I'm pretty sure it's Lunge and Slash causing it. My game was crashing all the time, but as soon as I stopped using it, it stopped crashing. Try to make sure you and your warrior party members aren't using it.
