People are looking at Tobi being Obito as a bad thing. I think it is a wonderful thing! Think about it for a second. Obito is Naruto. Speaking metaphorically, of course

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1. They were both screw ups has children
2. The love of their dreams liked the aloof, cool team member... leaving Obito and Naruto heart broken continously.
3. Obito wanted to become a hokage. Naruto wants to become a hokage.
4. They both had vey similar personalities as kids.
5. They both grew up to be great shinobi.
6. They both want peace, but go about it differently.
I look at Obito being what Naruto could have been... a person lost beneath a lot of power if he didn't have any friends to back him up. It is like heads and tails. Itachi even mentioned something similar to Naruto about having friends or ending up like Tobi.
I think that Obito can help make Naruto mature as a character. We just need to find out what happened. Hopefully Kishi won't switch back to the Kage battle or Sasuke before we find out. I think that the Tobi/Obito flashback will be the most interesting flashback of the series.