To his defense, he apparently bought a 'Fender' replacement neck in the 70ies which unbeknownst to him wasn't one.
I like Gilmour's voice and guitar feel, but without Waters Pink Floyd is just pretty ambience music. That said, I'm not a great The Wall fan either, if a project ever cried "VANITY!!!", it was that one.
I've seen him a couple of times live (inter alia on the Animals tour way back in the 70ies and I didn't even really like Floyd back then), for someone with as much playing experience as him, his right hand 'technique' is really bludgeoning. He hits his P carelessly and hard, you can practically see it shaking as he plays it. But what you then hear sure sounds like Roger Waters.