I did get to see them live, albeit post-Gabriel, in Vancouver on the "Seconds Out" tour. Chester Thompson played drums along with Phil. Just about perfect sound, and amazing lighting for the time, using a large number of overhead aircraft landing lights for power, plus lasers and, of course, dry ice smoke. (Pink Floyd's lights on their last tour beat everyone else's, ever, hands down, Genesis lights were top-notch at the time.)
It was a great night, one of the best rock concerts I recall. Phil and Chester did a dual drum solo, pretty much all of my favorites got played, and Phil actually cared enough about the audience that he got those in front to sit down so everyone else could sit down. It didn't last that long, but it showed a concern lacking in most other acts. Phil's tamborine solo where he plays it on various parts of his body was great, and you can only wonder what is happening listening to the LP.
You can pretty much hear what we heard on the "Seconds Out" double LP. Sure would be nice to hear that in surround, but it's not in this new release set, and is some of their best work at the time. I've still got my vintage LPs. Wish I'd also seen them with Peter Gabriel.