The main things that were going to replace gear treadmilling were just not good enough imo. The combat was fun for a while but got quite repetitive and lacks a lot of the good things GW1 had. I played Monk almost exclusively in GW1 in PVE and PVP, but the closest thing in GW2 (support guardian) just feels quite boring after a while. The sPVP hardly interested me at all, and I played GW1 virtually solely for the pvp. The World PVP got boring too, and the character pop in and general game design made it a huge zerg fest.
I played solidly for over a month and tried really hard to keep interested after I finished everything the game had to offer in PVE. I just didn't feel like I could repeat content over and over, and no amount of gear treadmill will change that for me, but might do for the ones left in the game.
Quite negative, but for a pve MMO it did a lot of things well. I like how its not just a treadmill and stayed interesting for as long as it did. I like the exploration part of it, how you naturally work with other players you randomly meet. I liked the bosses, especially the dragons or other big bosses the first few times. I would definitely recommend it but its not a long term sort of game imo, but worth playing through for a month or 2