I am disappointing in this game, for the more agreed upon reason, and by the unpopular (or less discussed) opinion that I feel like the developers were lazy in developing this game, again.
Remember, when we were hyped about Ganondorf not being Captain Falcon in Brawl? It didn't happen. I fell in the same trap again, thinking, "That can't happen again, right?"
Anyway, a lot of the final smashes not revealed turned out to be rehashes of their Brawl versions. Fox with Landmaster, Link with the hugely uninspired Triforce Slash, Mario's lame fire thingy. Toon Link looking exactly the same and not taking advantage of the plethora of material he has in his own games. Ike's Eruption, etc. etc.
The transition from 64 to Melee was so phenomenal, the introduction to side specials, air dodges, light shielding, trophies, Adventure/Allstar mode, Event matches. It was a true sequel. Then Melee to Brawl happened, and a lot of features were removed or gimped. Things that should have changed remained the same, i.e. Ganondorf, Target practice was butchered. I was just overall extremely disappointed when I first got Brawl, and this was way before I actually knew anything about Competitive Smash. I had hopes for SSB4, but I feel like it was just me being a fool, and that the devs are even lazier than ever. Nothing new was added.