honestly i think a person who knows how to solo all the way up to 40 would have a relatively low learning curve for party play, but i doubt the game should make only solo content. That said, the whole leve system is kind of bad now, since it is by and large completely ignored. If everyone is only doing 1 or 2 zones, and 2 leves out of the whole bunch, it is negating 90% of leves existence. They basically need to pick the sp of mobs a lot better, and give some other bonuses to leves that have less monsters, or difficult parties of mobs.

after doing some solo leves earlier, that i had left over, i can definetly see how the op got almost no exp, and had to do it on solo. While there are some cherry picked leves out there, high level, your probably going to have to deal with agro mobs, and your leve mobs, and a lot of the leves dont have a lot of mobs. So yeah leves are not really well designed as a form of exp. Not saying you cant get a lot from it, but you have to do it in a very specific way, in a small subset of the total amount of leves, and nowhere does the game hint to this. And then theres, why do these other leves exist, if they give crappy exp, and have the same rewards, and some are even more difficult to do (5 mobs spread out over an agro zone)

Also leves shouldnt negate most of the other facets of the game.