I've been having fun with the game, certainly. But it isn't without its faults.
I think my biggest issue is the poor difficulty balancing. Often times I found the only two difficulty options available in a mission were 1 level below or 3 above, which basically boils down to 'insultingly easy' or 'infuriatingly unfair'. Something about the leveling and the way enemies are setup means they take damage in a way that seems to have no coloration with your actual stats. A couple of times I've come across a group that were totally immune due to being 3 or 4 levels up (despite having a gun that was good for another few levels)
I started enjoying the game a lot more when I stopped choosing the hard or very hard rated difficulties. But it really lacked a sense of fair challenge. It got kinda dull...
Similar things apply to the strikes. The moon strike is waaaaay harder than its level, while the nexus strike on Venus was very easy (we were all one level below, yet made it through no problem)
Despite that the game is fun. Not sure how long it'll last due to the issues.
The story is total garbage though.
sets up this really interesting premise then forgets it , brings in these three extra, utterly pointless, enemy races that make no sense in context. They could have just been different fallen factions and that'd have made much more sense. I really had no idea what I was doing (or why) for the last three quarters of the game, and the ending was beyond lazy :-\
There were ten people credited for writing, so perhaps it was a too many cooks problem, combined with (I presume) a tonne of cut content.