I played it for a while on a friend's Wii U, and I gotta say whilst it's fun, there isn't enough content. It doesn't feel like a full game. Also my friends were better at it than I was (I don't play FPSs) so I sorta gave up and focused on Sm4sh instead.
Yeah I kinda got that feel from it. A lot of new games, while looking great and having some really cool stuff dot really seem to have enough in the content department. This was definitely a problem Destiny had too.