This is an MMO, in all reality. It has it's FPS aspects thrown in, but they don't overpower the game.
After having a few Strike missions with 2 of my buddies, I'm starting to see what this game truly is (at level 17). It's all about how you build your character and how you work with your fireteam. The story is just a backdrop to the fun of the game. Casual gamers will most likely not like this game. If you're the type to invest a few hours, at least, at a time to a game in one sitting, then you may well enjoy it.
A lot of the pissy reviews are coming from people who want instant satisfaction when MMOs are not built that way. I hated DC Universe Online until I hit the cap and realized that the story is just to get you to the truly fun part of the game. Right now, the game is actually pretty empty. Or maybe they just dedicate your field of play to the mission you're in (I haven't done any patrols yet). I imagine that once everybody has had a chance to play through the story missions, you'll see people all over the game's universe doing all manner of things. THAT'S the cool part about it. The optional events that launch randomly in each planet are pretty cool too.
The game is engaging if you are into this type of game. If you want a snappy FPS, this is not the game for you. If you want something to sink your teeth into, this is the game for you. It's really that simple. I won't be buying any FPS for a good long while (traded in BF4 towards my Destiny pre-order) simply because this game satisfies my FPS thirst and gives me SO much more than any FPS game can. Hell, this may well be the only game I play for months. I seriously enjoy it that much.
there seems to be zero strategy at all other than rotating aggro during bosses