As someone with a full-time job, I fail to understand why we only get 3 days to work on this? Can’t we get a full week?
Teams with more people have an advantage over say, a team of two who have to create 3D models, animations, environments, sounds, music from scratch.
The last time I entered a game jam, there was so much work that we couldn’t find time to design a UI.
A full week would allow more breathing room, while simultaneously increasing the quality of submissions greatly and in Donald Trump’s words, “What the h** do you have to lose?” 
I understand game jams are traditionally only a couple of days long, but I implore you to think about it.