Ah I didn't realize they split you if you're large. Still though, my primary annoyance is large cells that just don't move anywhere.

Just like the time for the cells to merge increases with your size, the cells also lose mass at a given rate depending on their size. The only way I have found to circumvent this is to stay divided at super sizes so I'm not losing 1k mass because I can't catch anyone. For those cells not moving, just let them starve until they return to normal sizes.

I think cells losing mass is a new feature, or at least I definitely didn't notice that when I posted my comment a few weeks ago - maybe they took my suggestion :)

If you get big enough that you are subdivided and your subdivided cells are significantly bigger than the spiky circles, you can eat them!