I think there is nothing wrong with Steve focusing a lot on Genesis material. This is an important part of his musical history and clearly the part that connects with the largest fan base. Many other artists do this kind of thing. His band does a decent job covering the other parts, but in the end it still feels like a Genesis cover band featuring Steve Hackett and is quite different from experiencing Tony, Mike, and Phil performing something from the same era (acknowledging that Darryl has a very different approach to Steve's parts).
I also have no beef about Ray playing lots of Genesis material. The world is big enough that anyone who wants to cover Genesis can go ahead.