I think if you cycle social media or forums enough, you will involuntarily sharpen your critical eye just because of the sheer number of perspectives you are exposed to. And when you cut away from the pictures of kittens and shit you can get caught int hat cycle where seemingly no matter what you might enjoy, someone else is out there indirectly saying you should only enjoy it only to a certain extent because x or y in it sux.
Kadey posted a while back (and she's not the only one to say this) that sometimes you need to just stop watching streams and shit and just go play games. Ever since that, hey, I've been having more fun playing games!
To go full circle on the MvC2 thing, people can't accept a good, solid B game that has problems anymore (unless it's made by Platinum or the trendy studio of the moment). Either it's crack, or that texture is fucked up fuck this game wdh. Look at 8.8Gate, UnchartedGate, and recently DestinyGate.
I don't even think stream monsters are given power. They are the power so long as they directly influence the business of fighting games and fighting game tournaments, and that will never go away even if eSports happens. In terms of viewership, anyways, whatever they say in stream chats has no merit or weight. You can't tell me a stream chat killed SFxTK or any other game.