This idea is completely perverse, IMO. By ensuring worse gear for the "noobs", you're making the game HARDER for them, and by giving the "pros" better gear, you're giving them an EASIER game. But the whole idea of difficulty levels in games is to give unskilled players a less challenging game, and skilled players a more challenging game, so that everybody's playing at their comfort level.
Reminds me of people who think that games with conventional difficulty level settings should reward people who play on "hard" with better gear than people who play on "easy". That just makes the "hard" game easier and the "easy" game harder, since success in these games is to a very great extent tied to gear stats.
Diablo already has a way for the hyper-competitive players to strut their stuff -- it's called the ladder. The other great thing about the ladder, though, is that it takes those hyper-competitive gamers out of the general pool, so people who prefer a more relaxed playstyle don't have to deal with em
Very popular games, like the diablo series, are popular because they are rewarding for a wide range of players with a wide range of playstyles. Personally, I am all for retaining this breadth of appeal. Proposals which punish more casual players are the antithesis of this idea.