Also, if not mistaken, he was influential in getting rid of the words "EPCOT Center" and, for simplicity (because we're all "ignorant guests" and never got the EPCOT concept) he campaigned for just calling it Epcot (after it was Epcot 98, 99 - then the debacle of the Millennium wand came - oh god, I just puked in my mouth).
Yeah, George has been around Disney for years but he may not necessarily be as pro-fan and pro-Disney nostalgia as you may think he is or want him to be. And while he may stress and focus on items like maintenance we'll have to see if it makes and noticeable change to WDW.
The Cars Land concept is cool but the budget for DCA's makeover was set about the time George arrived - he just helped to execute. And since he was man at the top at the time of opening (and success) he's naturally getting the accolades. The funding source came from the board of Directors who addressed a problem
The Epcot of today is so dis-jointed because it's spirit has been trampled on. From an Imagination pavilion makeover that looked like a 7th grade science project after it re-opened to a the Pixarization of the Seas pavilion, we'll never have the 1982 excitement of EPCOT Center ever again.
And really, what is left to explore there - in Future World they abandoned the concept of health (probably because most guests had a hard time getting their electric carts to climb the ramp into the pavilion). Will we build a "social media" pavilion full of interactive games - we already have that and it's called Innoventions. Land, Energy basically hold onto their origins with Transportation having tried to - but the others I don't even visit anymore because they're lame.