On if Kevin Moore is just an average lyricist:
I'm not gonna quote every post or respond to every specific point made, but, "yes." I'll sum it up based on my opinion on his contributions of each album. On Images, he wrote Pull Me Under, Surrounded, and Wait for Sleep. The second two are good, but I've always considered the first to be pretty typical 80's metal stuff, cheese and all. When it comes to Awake, I like 6:00 and Space-Dye Vest, but I simply can't stand Lie. It is, by far, my least favorite Dream Theater song lyrically-- Dark Master included. Finally, most of his contributions to WDADU are complete duds. I've never understood the love for OAMOT and everything else on the record from him comes across as really sophomoric in my opinion.
So, that leaves Moore at "average" or, if I'm feeling more generous, "a cut above average" for me. While that's still better than most of what I've heard on the last two records, it's still not "good" in my opinion. I didn't think it Kevin Moore's songs were really that good before DT lyrics took the nose-dive, and now that they have in many ways I look a bit more fondly on songs like "Pull Me Under" but not by much.
Misc. points:
--The same goes for his keyboard playing, really. I like it, and I liked him, but after I listened to some of the live-boots it became apparent which keyboard parts Prater had buried and, honestly, I think Prater was in the right for doing so. Kev was sort of a sloppy live player, too, and Jordan just really does seem to have been the best fit in the long run.
--Someone mentioned Steve Wilson lyrics. I admire a lot of the guys work, but lyric writing isn't really his strong suite IMO. He is still well above average, though.
--Rudess does a great job with atmosphere. As did Derek. I don't think Kevin had like this monopoly on atmospheric playing that people seem to think he did.