Hey McKenzie, glad to hear you're hyped! And yeah the replay value is off the charts with all the stuff we're adding, a couple of the guys testing the game have done like 5 runs of hinterlands chapter 3 to see everything there is to offer.
As for the old expressions, I understand the preference for them, I think I changed my style a lot over the last year or so, leaning a little more towards more exaggerated expressions, and it shows in the reworks. I expect people will get used to the change as the game goes on.
Here's a full comparison between the old and new expressions. You can see that a big limitation on the old sprites was that the way the sub sprites were set up severely limited changes to Asterion's muzzle shape.