I don't see the harm in allowing Melee to be involved. Melee might be old, but incase the biased SBR didn't notice, some people feel Melee is more tournament worthy than Brawl. The majority might want Brawl, but inherently that doesn't make it right, and just because smash has found new popularity with Brawl, doesn't mean we should just give up on the game that is just downright better than the other.
There is still some form of divide between the communities, it's starting to heal but goddammit, for you guys to just completely shut out one half of the community is a straight *****slap. Yeah I get it, some how "new=better", and also "new=more $$ opportunities" and "new=popularity" but you guys are thinking with the dollar sign and not what's inherently true:
Melee is more suited for competitive play than Brawl.
Edit:
So what's the harm in having both run? See how it goes, and if the Melee side flops completely than don't do it again. I'm not saying do ONLY Melee, that's just blatantly ignoring the situation, but it gets me mad when I see these frontrunning mods closing every Melee related thread, and instantly saying "Allow Melee competitions? You guys are DUMMMB". Are you serious?