Can I ask a question? What is it so important that the transition be seemless? I think the concept of an updated Melee-style Smash game has a lot of merit. I don't think an "updated melee" that plays exactly the same with a few more characters does, though.
I'm just saying, a few minor differences are OK and help differentiate between Melee and Melee 2. The game will still offer technical depth if, say, landing detection is not "fixed" and other buffs are put into place for Marios SH bair waveland or whatever. Imagine if Melee 2 came out tomorrow and the game was pretty similar to melee in terms of technical depth but offered other or additional challenges, landing was a little different, etc. No one would really complain and it would help solidify its status as a different game.
Right now the aim seems to be more of a WoW patch for Melee than a new experience.
"If it ain't broke don't fix it" is good as an idea sometimes, but adding new or "different" technical challenges isn't going to make PM a lower-quality codeset, and will make it feel like a more natural extension of the series instead of Melee with better graphics, which is what I'm ultimately worried about. You guys think right now that you want Melee Again, but it's because of rose-colored glasses. A few months after this hack is released, will it have been so worthwhile to hammer out landing detection or whatever? Is it really that important that you die at 100?