Impmacaque
Smash Journeyman
'Brawl was just about as complex and deep as Melee
I've heard this sentiment before and I will never agree with it (I'd go so far to say as it's objectively false). However, it's a dead horse that doesn't need to be beat anymore, so I won't elaborate further.
Back on topic: Smash 4 will be competitive because the smash playerbase would be willing to play it competitively regardless of the state it was released in. That said, this game is not melee and Sakurai has made it clear that he doesn't wish to design another melee-esque title. If you're expecting a melee-level rabbit hole of potential technique and execution, you're looking at the wrong game for it.
A new meta will develop around the intricacies of Smash 4's engine and character roster, but I would expect the trajectory, style, and evolution of that meta to closely resemble Brawl's unless the game is changed from the build we have seen at E3 and played at Best Buys.