Well, if Jeff gets insulted that's sorta his problem, isn't it? He left Nevermore because he wanted to be Yngwie Sevenstring and be a guitar hero. As soon as he picked up the seven string, the albums became much more solo-based and less song-based. The riffs were there to just play along with the drums instead of having a life of their own, as if they were just really long buildups to the solos, as if vocals to him were just an afterthought. Every album had some great tunes on it, however.
This is just my opinion, but seven strings don't belong in thrash metal. They just muddy up everything. When tuned that low, riffs need to be slow, fat, and heavy. Doom. If you want to play fast, then it's either Meshuggah or death metal. And then to tune down another half-step from B to Bb? It all just becomes a chocolate mess.
Still love me some EoR, though.