Did you ever listen to "Whispering a prayer" by Vai then? I can only recommend it. To me it is one of the most beautiful, unique and inspired pieces for guitar ever. Wonder if you can find something about it.
Also the 7 string does allow for very different solo runs and riffing due to the extended range, you can build more melodically, it does not have to be flashy. There are much more possibilitys in playing it. Next youīre gonna tell me that Trems are just flashy (again, Whispering a prayer). Popularity of the seven string also played quite a large part in the birth of Nu Metal I dare say (whatever you may think of that style), as especially Korns music was made possible by it. Extra chunk for riffing without sacrificing range, that is a big thing.
Donīt you know the feeling that you listen to a guitar player and there is no big thing you dislike, you know and see that it is technically and musically sound, but you still donīt think it is great?
On paper itīs all good but in reality there is just not "it"?
This thread is a mixture of that and not liking some aspect of some player, while still very much respecting him (though I feel much more of the first).
Btw, I would like to hear what you think about Dimebag, Paul Gilbert and Matt Belamy, if I may ask.