Yeah I've put about 50 hours into Destiny so far and I absolutely love it. I'm not going to say the complaints about the game are "inaccurate" but I don't think they're actually important, to me at least. The story *is* paper-thin, the world *isn't* as "open" as some people may have though it should be, the RPG-esque skill trees are pretty shallow, the different classes play a little more similarly than they might in another game. All of that stuff is true, and none of that stuff has had any negative impact on my experience with Destiny whatsoever.
Destiny is a game about shooting a bunch of different things in the face. That's it. It makes shooting those things in the face extremely fun to do, it gives you lots of different things to shoot in the face, lots of different reasons to shoot them in the face, and lots of different guns to shoot them in the face with. If you do not want to shoot things in the face, then do not buy Destiny, because 99% of what you'll be doing in Destiny is shooting things in the face. If you *do* want to shoot things in the face, then Destiny is probably the best game for you to have come out in at least the past few years.
It's kinda too bad Bungie didn't communicate what this game was really all about to the world better/more accurately, though. I definitely have friends who thought they were getting some Mass Effect / Fallout-esque epic roleplaying game full of skill trees and character builds and NPC storylines and stuff like that, based on some of the more grandiose claims made by Bungie, and it's totally justified for those sorts of fans to be really disappointed with the experience Destiny ultimately provided them. It's also too bad in another way because I know there's straight action/shooter fans out there who have passed up on the game because of that same perception. I had to spend 15 minutes talking a buddy of mine who doesn't give an eff about RPGs into trying Destiny because he thought it was "one of those boring conversation tree games like Mass Effect" but now that he's playing it he absolutely loves it.
tl;dr -- Destiny is for shooting stuff in the face in.