lol we still are using the 2.x base for our project. recently got a code thats similar to turbo mode working as well (LOL samus) however have been using the brawl minus max characters and stages. the PSA are very intuitive and well designed. a lot of fun. honestly i like a lot of characters in max more then the ones in PM. tho i think ZSS needs a major update, she's fallen well behind. i don't think she's been updated since pre max. she's not even in the characters that were edited in the posts under the change logs.
You're right about that, she hasn't been updated. No one is sure what she needs other than a safer recovery. I also agree that many of PM's characters get stale very quickly. I can only use Link, Roy, Ganondorf, and Zelda a few times before I'm ready to stop playing that game. Minus usually lasts a few hours at a time though. More creative movesets.