Someone was asking Roger about what it's like without Gilmour there, at the time he had Dave Kilminster in the band. He says it's great having Dave in the band cuz I can hear all the guitar parts perfectly, flawlessly and I don't have to hear anything from David.
Granted the Pink Floyd band with all of the members in it had a magic about it that wasn't entirely Roger, sure it was around 90% but David's fantastic guitar playing and tone, and beautiful completely different sounding voice made that other 10% pretty special. The keyboard player he was kind of restricted for some reason, he was heavily influenced by Syd Barrett he loved him, he loved his style, he loved his approach to everything really and when he's unleashed she can play some wild stuff but Roger kept him in check.
Roger would come up with the ideas behind the parts and this guy would play 'em that's it. Nick Mason, the drummer, well he was just there, probably could have been anybody.