Once you get to level 40 there's a lot more stuff, especially the raiding and "portal" mechanics allow for some interesting MMO co-op experiences.
It's a decent game, I enjoy the social aspect and some of the progression mechanics but imo the combat of MIR4 is very lackluster which holds it back from being more than a 6/10 kind of game for me.
Yeah, the combat system is bad, I don't know, at least it takes the fun out of it by being so lazy, but hey, that's just the way it is. For now I would give it a 6 as well.