I tried this mode, and I agree with all the others that this is very satisfying and perfect balance between melee and brawl.
However, this is the same feeling I have about Smash 4 vanilla. I understand the point of view that it is campy and slow paced, but I feel that is only at low level play. I don't know about anyone else, but recently sm4sh has been starting to feel more fast paced. It might be a placebo, or players just playing really well.
However, I still feel that adding this mode into the official ruleset will make this game even better. I just don't like that some characters have nerfed recoveries, but that is all.
I'm just hesitant to playing this mode too much because I'm afraid it well mess up my vanilla smash 4 play. I have the same feeling about customs. If we just finally get our heads together and don't make ignorant decisions, we can get a nice ruleset and we won't have to worry about multiple metas. And this mode is a really nice mode. You don't need customs moves for this either. And it's easier to obtain the badges than all the custom moves IMO.
That's just my opinion though.