I feel like everyone in here is supporting a position that is only really good for them and not really for the community. It's basically "I like it this way because it feels good to me!" or "I want it this way because it feels right to me!" What I think we really should be talking about is how this is going to affect the Smash community as a whole.
Here's how I feel it'll break down:
If we keep normal Brawl as the standard, it will evolve, techniques will be discovered, a metagame will be created, and the only thing separating the competitive people (which are a stark minority mind you) and the casual gamers are a level of skill.
On the other hand, if we make Heavy Mode the standard, it will evolve separately of the way casuals are playing regular Brawl. In other words, you'll have TWO metagames. The thing separating casuals from competitives will then basically be playing a new game.
What I'm trying to point out here is that right now, with the standard mode, we're ALL trying a new game, thus we're all on an even footing. On the other hand, if we split off into Heavy and Non-Heavy, we'll be playing two completely different metagames and disunify the community as a whole.
Ever try getting into a match on an Asian server in Brood War nowadays? If you haven't played in a while, you'll get absolutely spanked because it's a metagame that's so highly evolved that you've not the slightest idea how to get yourself accustomed to it. The Heavy Brawl would be just like that, except that, to a casual, it would being unable to get into Brood War even though you've been playing it for seven years!
All I can see up ahead is isolation and harsh feelings. And don't pull that "melee had no items/ban stages" crap, because so many casuals ALREADY played like that anyway. I, for one, couldn't stand the items at first because it was all way too chaotic. Plus, items don't fundamentally change the way the game works, it just adds an element of randomness. Turning on Heavy Mode completely changes the way the game works and feels.
I really wish someone from the Smash Back Room would come in and settle this already. I just want some **** closure, Heavy Brawl or Regular Brawl.