Hey unikron, we finally made up our minds and updated to 2.4, and I'm afraid that I have bad news for you. Now, since a screenshot speaks a thousand words...
Just after hitting Play. Happens with the executable as well once we reach that scene. As you can see, we have tens of sprite elements per scene (nearly 100 gameObjects on this scene only), and we need a lot of collections for several purposes (although we are planning on reducing their amount in the following weeks due to some rearrangement on our core game), and I'm afraid that the total size of the collections/atlases is huge.
If you need further insight or some sort of repro case, I'll help.
I'm adding the shot as an attachment so you can see it bigger.