Tommy Shaw and James Young were always the more straight-on rockers in Styx, and they still do all their classics, plus I've heard that Lawrence Gowan is great. They have to do "Come Sail Away" since it was one of their biggest hits, but other than that, you don't really miss the Dennis DeYoung songs. I almost feel like saying that is stabbing DDY in the back, since he was always my favorite, but hey, he's gone and the band carries on. Kinda the same as Steve Perry and Journey. The band is more important than any one person.
Which brings us back to Yes without Jon Anderson. With Geoff Downes now officially in and Oliver Wakeman out, we're back up to four veterans out of five in the band. Supposedly Benoit still has some off nights as lead vocalist, but you know the music going to be awesome.