I think it's a weird thing to assume that gamers were interested in his persona more than the actual game. This almost reads like CliffyB thought his work on Gears gave him a Spielberg'ish reputation, where people would check out the game simply because it was directed by a specific person. But I highly doubt any Xbox fan would've approached Lawbreakers with a 'Dude, shit, bro, this is the new CliffyB game, totally rad!' attitude.
My point is, nobody bought Gears because of CliffyB, they bought Gears because it was a game that looked next-gen at the time and was actually pretty fun to play. CliffyB has never been the celebrity he apparently wishes he'd be. I'm sure the guy is a good designer, but the diva attitude he displays is a bit embarrassing.
Lawbreakers tanked cause it was a good, not a great game in a market that already had a great game doing basically everything better. On top of that, it always seemed to me that the man has absolutely no taste at all and that's all over his games. Can anyone still watch the Gears cinematics without feeling the cringe? Lawbreakers oozed the same vibe. Cliffy seems like he's the personification of this gif, someone who tries super hard to be cool to the point where it makes the hair on your neck stand up.
He should just be himself and keep making good games, cause he obviously knows what he's talking about in terms of design. Just don't try to put your stamp on art, don't try to be a celebrity. Just make cool, well designed stuff that people enjoy. The industry would need more designers like him if he could get rid of the 'I know what 'cool' means' shtick.