That seems like a crippling feature of C3 to me. I guess I just can't imagine not managing and optimizing graphics assets. Why would I want to load frames from a giant boss creature when I want to fire a bullet that may be auto sprite sheeted into the same texture. For another example, in my game I include a bullet graphic plus fx for the bullet all into the same sprite object so they will be in the same sprite sheet at around a 64x64 texture. In C2 I can load that on the fly no problem. No jank. In C3, if the system decides to split that off into different sprite sheets, then it will load in a sprite sheet that could be 1024x1024 for the bullet, then it might need to load in even more large sheets to get the other bullet fx in. Wouldn't that also be more jank?
TBH unless your player animations are absolutely huge with loads of frames, splitting things out in to separate objects is probably a micro-optimisation that doesn't make much difference. It also can jank the game as it loads textures mid-frame if the object isn't already preloaded by being placed on the layout. And currently the engine doesn't release textures until the end of the layout, so the peak memory usage will be the same.
I am probably in the minority, but I am working on a larger game with lots of animations in larger layouts. I depend on being able to smartly load in textures. Peak memory usage would not be the same, because as in my previous example, instead of loading in 10 death animations, I only load in the one that I need when it is needed. I never need all 10 death animations. Also there is no jank, even if there was, it wouldn't matter that there's jank when you die.
I also don't understand all of this jank concern. Ori and the Blind Forest had jank when you got to new areas because it would stream them in instead of loading. Who really cares? Feeling like you were in a huge connected world was amazing. As long as you smartly load in textures in areas where it doesn't matter, the majority of the gamers won't mind. I guess thats personal preference though
I've already had to make changes to my game design because I can't have large layouts (due to not being able to unload graphics.) .