So I've been working on your H&H and constantly re-PMing it to myself, and I think there's one glaring flaw: it's kinda complicated. :/
There's tons of moves that need to be used very specifically, and along with your combo/edgeguard/finisher system, I think it might be a tad overwhelming.
You can ignore me of course, but I'd suggest having every character have only one move (that halves the difficulty there) while integrating the combo/etc. system into those attacks themselves.
Also, as much as I liked the old aspects of H&H (Final smashes, different sessions), I think it would be much easier just to do away with them and take H&H into easier to grasp territory. That's the one thing I noticed with the last games - they got more complicated, less people wanted to play. :/
Anyway, yea, feel completely free to disagree and ignore me. Just my thoughts. Otherwise I can just stick to pretty formatting. H&H8 is gonna have a cool-color scheme. It's purple! :D