Perhaps. It's not like there aren't other magical choices to choose from, such as Necromancer. I guess where I see the difference here and why I think Tinker works as a good fit is that we really don't have any sort of class that works with it's attack type.For the most part, each of the new classes introduced haven't really played that much with the other ability types in game. DK uses Death Magic, which really isn't used elsewhere. Monks use Chi, also not in use elsewhere. DHs use Fel which is also used by Warlocks, but in a vastly different way (Warlocks wield it whereas DHs allow it to encompass them fully, similar to the Priest/Paladin distinction). No current Player Class uses technology except as a portion of the Engineer profession really at this point. In that way, Tinkers add something we don't yet have.