For sure, Satch has excellent vibrato. He’s also extremely melodic, one of my favs.
I don’t know why, but since I always viewed guys that pick everything as “morally superior” (huge lol/sarcasm there…I heard Paul Gilbert tongue-in-cheek say that with mockery in an interview) I never really got into learning many Satch tunes. He’s actually got a pretty cool picking mechanic. Check out this “tremolo” strumming.
He could do some serious damage if he tried applying that to single note stuff. It’s looks really fast, but relaxed too. Not saying he needs to or anything. He clearly took the legato thing and ran with it and that’s his “sound”. It just always interested me how him and Vai have some similarities but Vai explored the picking to a greater degree.
And just in case anyone reading this mistook my smart-assery, I do not think guitarists who choose to not pick all their notes are morally inferior lol! As a 16 year old kid, the machine gun like alt picking of Di Meola and Petrucci was was caught my ear and made me want to practice. That’s all 
Satriani, Kotzen, Holdsworth, Garsed…all freaking incredible. If I could legato like them, I wouldn’t worry about picking much either 