That´s one important thing to do before judge 

The game is extremely addictive and feels way more exciting that NSMBU

If individuals make better levels than Nintendo then I think Nintendo should just call it quits lol

LBP also has "millions of levels" and there are tons of gems but there are waaaaaaaaay more terrible levels as well. If Mario maker had coop I would care more about it.

While I love Super Mario Maker - I even wrote a glowing review - I can understand why some people don't like it.

d21lewis' point about progression is a good one. I like the feeling of playing levels, finding hidden items, beating bosses, and "finishing" a game. And you can't quite capture that in Super Mario Maker. In that way, a game like New Super Mario Bros. U is, I think, superior to Super Mario Maker.

That said, I'm very glad to own Super Mario Maker, and I recommend it to anyone who owns a Wii U.

Is not that they are better (some of them are actually better though), is that they are way more surprising, you don´t expect the way peope twist the Mario formula and some of them are damn fun. But as fun that part of the game can be the creation process is the real star, you would not imagine how addictive and engaging is to make your levels, you don´t have to know what you want to do, when you start making them the ideas start coming and you end up wasting hours like cookies while making your levels, this game makes time dissapear, it is freaking addictive, also the game is kind of like social network where people plays your levels, give them stars, leaves you comments, they follow you or you follow them, you play the levels your friends make, and you need a whole lot of stars to get the 8 medals and really complete the game so you better do some nice levels.

The game is a great experience, is amazing how fresh and different it feels when is just Mario, but it does.

That is actually pretty good point. Am not playing it as much as i thought i would. Not really sure if i can criticize others for their levels since i am not really good at making them either. I guess in general i can say that the levels are either automated, really easy ones or just downright demonic in their difficulty. There is just not that sweet spot you find in the the developer made levels. 

Still am glad to own it as fan of 2D Mario games and there are some gems to be found in community levels. Still early days and maybe i'll make a decent level and have heart to publish it. 

And what is the problem?

I love the game. Best game on the Wii U.