I'd have to disagree on a lot of that
Sure - in Norman it was never loved, but I know I've talked to plenty of smashers that LOVED Brawl, and either hated Melee, or would "never go back" - so it's kind of a rough place there.
Its kinda like that girlfriend you thought you loved in Jr. High (fickle, shallow, and never putting out)!
"I'll love you forever" And somewhere deep inside is a crazy adolescent ♥♥♥♥♥ (thats metaknight)
Having 2 girlfriends at that time sometimes helped, this is to say that I recommend playing Brawl Doubles, which tends to be a little more exciting than singles and has strong support in the community.
"Never" is a long time, most people have gotten over that, like 90% of the extant Melee scene played Brawl at one time or another and went back.
Project M, you have to see it not as a divisive force, but rather one that reinvigorates interest in smash in general. Like I said, Smash games are legacy titles, and the homebrew scene is really gaining alot of momemntum right now, so they are worth considering and supporting. These might be the future of smash if the games end up being evolutionary dead ends. The vast majority of players that I talk to at smash events think very highly of Project M. The full game isn't released yet, but the demo has been more than impressive.
As for requiring special knowledge, it doesn't require anymore knowledge than playing any other smash title.
Because of the PSN store being down, its unfortunate that AH3 has been unavailable for download. This really put a hamper on what was a huge burgeoning community (that was even bigger than BlazBlue for some reason) we had over 15 people playing just in my area but we still only have 2 setups. Its a tragedy, so support it as well as you can. Homingcancel.com for metagame and community info.