That's a pretty harsh review, but I can tell you walked in with the same hopes and aspirations as I have, so I can't really correct you where I haven't even played the game.
Still, I think one thing bears over all others, which you did caveat your post with, and that's that people don't know anything about the game yet. People have and will continue to claim to know things about the game, from before it was announced, to before it was released, to before it was played, to before it will be well understood. Time will clear all things, and I am confident that Nintendo hasn't botched their golden child, and that this will be the greatest fighting game ever made.
Based on your review, I don't think you truly accepted the warning people like GimpyFish and HugS have been sounding off, and that is that this is a totally different game. There is no reason to assume dash dancing this, wavedashing that, edge-guard this way, combo that way. When you walk in with all your Melee assumptions, even though you say you know it's a new game, of course you're going to be dissapointed and frustrated when it misbehaves.
I am going to do the same thing I did with Brawl as I did with Melee:
#1 Get the game and play it, as a video game, not some platform for my ego of how good I am. Accept that I suck, and not attempt to force-feed my character moves I'm told are good (or should be good, or were good in Melee).
#2 Through my enjoyment of the game, remember what I observe. Effects of button combinations. Items. Stages. Priority. character and player habits. What is good for adding %, what is good for finishing off. How to prolong my own stock.
#3 Get involved in the community, as a lurker. Don't run out and go "omgwtfbbq luk wut i fownd" posting some totally useless crap, simply because it was new to you. Instead, take in all these ******** posts by others. Take in the response they get. Some will actually have meaningful applications, as time will tell.
#4 Apply your knowledge. Go out and play people, on-line random matches, friend wifis, local smashfests, and eventually, tournaments. Continue having fun with the game, but apply everything you've learned. Never in this process should you force some weird play-style on yourself, either from what you would have expected from Melee, or what you were told to expect from Brawl. Let it flow.
#5 Having played through the game thoroughly, unlocked everything, played many matches with many characters on many levels, saw many "unusual" things which through the discourse of the community become more understood, you are now, at this point, MONTHS after the game comes out, equipped to analyze the game, and to discuss technique & strategy. At this point truly advanced techs will be emerging, which will then only be possible because of the context of mundane established by everyone freaking over every minutiae of the game.
#6 Now it is a competitive, well-understood game that you can have intelligent discourse in. Smash reached this stage about 3-4 years after it's release. So everyone needs to untwist their nuts and follow these steps.
Syn, only the 1st 3 lines of this post were directed at you btw. The rest is just stream of thought ranting, that your post induced because it was very insightful.