Meh,
I'm not a huge "Gears Of War" fan, but I will say that stereotypical productions that do their thing well are important. Basically if it wasn't for the Marcus Fenix type of hero forming a baseline for what a shooter hero is, there would be nothing to compare those who "break the mould" to.
It's sort of how in comics, if every hero some some dark, edgy, anti-hero, and there aren't any straight forward White Knights who successfully save the day doing things the "normal" way, the counterpoint loses a lot of it's meaning.
By all accounts "Gears Of War" doesn't break any new ground for the action hero or the way a scenario is scripted. Marcus pretty much being another version of "Rambo" and his ilk, but that's a good thing when it's depicted well (which this was). It makes other shooter heroes like say Issac Clarke or Gordan Freeman stand out as exceptions.
I'll also say that for all criticisms doing a "normal" script well can be harder than going off in wierd directions. There are plenty of games like "Gears Of War" that have tried to do the same exact thing (before and after it) but failed because they weren't as well written or put together.
See, the reason why someone like Gordan Freeman is awesome is that he's as Miracle of Sound put it "Chuck Norris in a geek form", a scientist who looks like a typical science weenie doing the kinds of stuff a Marcus Fenix type would normally do. If it wasn't for characters and stories like "Gears Of War" and the games that came before it, Gordan probably wouldn't stand out as the counterpoint that he is.
Sometimes I like my offbeat heroes, but sometimes I want the traditional versions as well.
To use comics as an example again, dark, brutal, nasty heroes and stories have their place, but sometimes I want to see Superman save the day and show that it's possible for good to win in of itself without having to stoop to those levels.
Right now for all of his "recanting", I think the bottom line is that it's currently chic to knock people who do anything "normal" or "straightforward" within a genere, oftentimes by people who fail to realize how important that mould actually is to everything else.