Overrated was a bad choice for a word. I should have said that she overestimates herself, by a lot. Any interview with her, she makes out like she's the world's best shredder.
Andy is one of my favorite because he can shred like any other of the neo-classical shredders, but he's also very melodic yet somehow aggressive. He'll never get the credit he deserves though because he's in an actual band. Like Petrucci from Dream Theater for instance, even though he's in a band, he has all these other projects that completely focus on his guitar skills and he shows off a lot live. If Andy had a solo album or would have continued playing the solos like he did back in the 80s, he would get much more credit than he does now.
I've always heard Batio was a nice guy. As cocky as he seems on his videos and stuff like that, he seems pretty cool in interviews.
Yngwie on the other hand, I've never seen anybody say anything nice about him. I think he's overrated too. I respect him for starting that whole neo-classical style, and I think he's an amazing shredder, but there are other guitarists out there who are as good, if not better than him. They also have a much cleaner sound than he does.