I was doing a lucky egg evolution marathon last night and noticed that the animation for evolutions changed. This is with the latest patch v0.33.0.
I can tell it was different but couldn't quite pinpoint exactly what. More research today confirms that it did change, and some new things like how you no longer get to see Rattata's butt.
I also noticed that after evolving a pokemon you already have in your dex, there is a 5 second long staring contest with your new pokemon as if your pokemon got amnesia and is getting to know your name again.
So what change... the butt shots? More importantly, is the new animation longer or shorter, or the same?