Updated monster model and animations?

I feel like I'm going crazy but do some monsters have new death animations and new models?

-Small monkeys in act 2 have fur
-Snakes in act 2 curl up longer when they die
-Green golem bombs in act 7 have a circle and are more noticeable
-Kitava's herald's wings twirl in the air and then fall to the ground
-Many ranged attack monsters have better animations with winding up their attacks
-Monster projectile spells have this new trail effect
-Many monsters have more variety in the way their bodies lay on the ground
-Eramir's(act 2/6) hair looks different?

There's many more that I'm missing and forgot to keep track as I played along the campaign. It's hard to describe it but the monster animations seem smoother now, possibly with the addition of new and more frames?

There are monsters coming back in PoE 2 as well, They probably import those into PoE1 to replace the old models etc