As I have hosted a few of these jams now and have played every entry live I have to agree on these points. Especially being able to properly exit, it can be a real nuisance at times when I'm trying to manage the streaming software in a pinch but don't have an effective way of accessing it.
Another point that's a little more personal for me, as someone who goes through every entry one that bothers me is when games are simply just called the name of the game jam. It can be difficult managing folders of games when some have near identical names. I know coming up with titles can be difficult but even if it's a descriptive title that describes the game in some way that would be better.