I agree with the OP. Leveling an alt is a chore -- even getting thaumaturge to 26 for swiftcast was a huge pain. It's not hard, it's not challenging (heck, it's not even particularly slow if you latch onto a fate or chain train), but it's BORING. Ideally in a MMO you should be able to level alts (alt classes in this case) by doing entirely different things. Level one character through quests / main story, another through sidequests, yet another through dungeons / guildhests, one through pvp (when available), etc etc. Right now the options just aren't there.

Quote Originally Posted by gintoki88 View Post
you should be more clearer, you mean the first time bonus exp you get from each guildhests for doing them the first time
Which is the only thing that makes guildhests worth doing in the first place.