Yes, Shane hasn't won any world title yet, which really doesn't take anything out from his value as a player as already noted.
He is one living proof that Pool has advanced.
Actually in Athens another Greek champion won that tournament, Apostolis Aleksandris against Nick in the final.
You know my opinion on the alternate break formats, I don't like them, but that doesn't take anything out from the Greek players doing well in any tournament with players like Shane, Ralf, Niels, etc...
As far as the challenge match, it was definitely an exhibition of superior Pool by Shane, easy table but still one of the best sets we've seen in 10ball ever.
Shane practiced the break a lot there too, and rack your own may not be the crucial factor in breaking, especially with his break but it is important even when a magic rack is used.
During the tournament Shane didn't like the rule of racking for your opponent which stands in Greek tournaments if any of the players want to follow it, out of courtesy one of the Greek players that wanted to aplly it against Shane gave up on the idea against him. A magic rack was used in the tournament too.
So racking your own doesn't take anything out of Shane's game value, but be sure that as a pro Shane doesn't want to take out anything from his game too...