We cant tell in any way if the client crashed during loading screen...
When everyone is 100% loaded, you start to look at your screen endlessly, waiting for the game to start. Sometimes, a player quits thinking the loading screen crashed and wants to reconnect, without any way to know if they did crash for real or not. To address this problem that i find really annoying, i have a solution: PUT SOME ANIMATION. Im not saying fully animated champion slices or backgrounds, that would slow our toasters too much. But what about, a circle like the one used for Apple devices, Youtube, or ANYTHING else? Heck, even just a very small particle somewhere would do the job. I dont think that would require a lot of work...