I agree its mostly "kill x of enemy Y" but isnt that really what most mmorpgs are for to achieve level progression? Its almost like saying that i dont like FPS because I am always shooting things. It goes with the territory. If its this rehashed formula you dont like, then Tera will not appeal.
I just believe as far as the kill x formula goes, Tera on a technical level does it better than any game before it. The artists did a fantastic job rendering this fantasy world using the Unreal 3 engine. The game has a very solid and organic feel to it.
I am in the GW2 beta and honestly could not play it for more than 30 mins this past weekend after playing Tera for 2 last months. GW2 does feel like an antiquated grind. Tera at last puts a fresh face, graphics and melee, on this formula where it does not feel so grindy.
I am a jaded old gamer and am very impressed with what Tera has put together.