Look. Aside from the fact that your criteria for judging musicians according to technical ability is completely shallow... Petrucci isn't even near the top based on technical ability.
Bireli Lagrene is a gypsy guitarist who can play circles around Petrucci. One example of many.
Petrucci's soloing is a joke. It's almost guaranteed that if I skip to any random place in a DT song, lo and behold, Petrucci will be fretwanking right there in his formulaic 'choose a pattern, play it as fast as possible and climb up the fretboard' style.