Agree with most except the Mercy BJ (and by extension Lois etc)
Sorry it takes so long, but it's upgrade your PC time then. Loading isn't an issue for me and the animations are great, and we won't be getting anymore of them.
I did a bit of investigating into my performance drop since your perspective made me re-evaluate if I was wrong to be annoyed and I'll stand by my position that it needs to be optimized better (although I will concede I do need to upgrade my set up).
I started out by testing out the Mercy and Lois animations off a fresh launch with no other programs running and was shocked at how fast it was only 10-15 seconds which is completely tolerable, but as I performed more actions I noticed it. The program just started eating more and more of my computer's memory, and the slowdown became more pronounced, I don't know if it's a Unity issue or a programing issue but memory bloat is the problem.
In my testing I got up to over 1 GB of memory being eaten up in no time at all, and it never dropped back down. Which to me seems crazy for a game with no rendering, music, or physics engine. This likely means that each instance and scene is being loaded into memory and kept at the cost of memory bloat. Meaning as I unlocked more and see more scenes the game starts to eat up more memory which is likely why my computer has an aneurysm during the animations. I never realized that by the time I unlock the animation scenes in the game, too much has been loaded into memory for my PC's processor to manage effectively, especially if I'm trying to do something else in the background. Thus, it has an aneurysm as it tries to load the more memory demanding animations.
I didn't keep testing to see what the upper limit on memory bloat is, but with a full set of cells, I shudder to think just how big it could get. So while this is a "Me" problem and it may be "upgrade your PC time" I wasn't wrong to complain about it being poorly optimized, I just didn't investigate why the Mercy animations took so long to load for me. Now that I have, I feel bad for my PC's processor and RAM for having tried to multi-task while playing this game.
Anyway, thanks for your input which made me investigate this issue more. Let's hope this issue gets fixed or at least that the memory bloat doesn't get so bad that more people start experiencing these issues.