This reminds me of something that takes us on a tangent from all the above. I recall dismay from older "proggier" fans that the CAS tour didn't signal a sudden mass-return of 70s songs. I believe many of them thought it might have done for two reasons. First, that RW's voice isn't far from PG's on the vocal spectrum, with a certain kind of duskiness. Second, these fans clung to this absurd belief that what they saw as the 'poppier' more commercial trio material they disliked was Collins's "fault" and that with him gone, old stuff would flood back into the setlist. (Admittedly, RW would potentially sound good on FoF or the first bit of Cinema). But it highlighted how silly that attitude was and still is, with even some on this board maintaining that PC "took them in that direction." He didn't; all three of them did.
100%. Just look to their solo material for proof. If they were constrained within Genesis to be "poppy" because of Phil then their solo albums would have been an obvious outlet for something more adventurous, but it's not there.