The main arguement I've heard against distributing the episode maker is that JJ2 can only handle a small amount of episodes before it crashes (8 I think). This would be very confusing for people new to the game, when after unzipping another level pack JJ2 refuses to work properly.

Then again, you get people who upload levels to J2O and mark them all as "hide from home cooked levels", or even worse, mark none of them as "hide from home cooked levels" and use great big 50-character filenames. And then password them, so you can't clean up the mess without deleting the levels. Oh, and then they forget some tilesets, but don't tell you, so you only find out when you're halfway through the pack and JJ2 dies on you.