IMHO, I like the game, it has its faults, ups and downs, but the gunplay is fairly solid and addictive.
But.
I think the problem with Destiny lies in its identity, or the lack of it, and ironically, I think what's wrong with Destiny kinda sums up what's wrong with the industry as a whole.
It's like Bungie had some kind of pressure to create something new, something groundbreaking. Because hey, that's what looks good on review blurbs, which look good on huge ass posters and trailers.
Bungie's craft was fairly simple. Make a good SP with an interesting story and good narrative with an added full COOP option, plus of course a freakin' good MP (Huge maps with vehicles is what I loved about it) to top it all. Halo 1-3 (Might Reach as well) were this. Nothing more. It didn't really reinvent itself through the sequels.
But with Destiny, for some reason they wanted something new, something that has never been seen before. Something games journalism (respect for those that don't) wants, or perhaps it's better to say, something that became the major hobby-horse for most of them. (See Driveclub's case for example. Trashing a racing game because it has nothing more than racing. Blasphemy.)
The inherent, forced need for innovation, for something that is different. (this might originate from motion controls perhaps, but if done right, those are an entirelly different story.)
Does Counter-Strike Source has an innovative gameplay? No. Does CS:GO has it? No.
LOL? DOTA 2? WOW? Or perhaps COD? Hell no! Yet these games are practically among (if not) the most played games on the planet. (One might say. But hey! What about Minecraft? I'd say it is innovative in that it virtualized the LEGO experience and mixed it with RPG elements, but is it truly that new, groundbreaking? No)
IMO, the bottom line is that developers should keep what's good and try refining that formula instead of desperately trying to invent new things. Not every game needs to be open world, we don't need achievements for every single fart we pull of in a PVP match. (Seriously, games nowadays almost reward you for dying nicely)
Give me UT, Quake or Destruction derby or Burnout 3 (this list could go on long) any time over the grinding, repetitive and mainly boring innovative cooperative experience of Destiny any time. (The PVP can actually be pretty fun. But just until you get killed because of a glitch, an unballanced weapon, or you realize that your class is shit compared to the others and you start with a handicap)
Luckily though, Bungie decided to keep one thing. Gunplay.
For me it's gunplay that keeps Destiny from falling into the deep hole of mediocre games.
Make no mistake I don't want to tell the developers what game they should make, only that innovation for the sake of innovation leads nowhere.
And to answer the OP, I think Bungie doesn't even have the slightes idea of what are they doing. Or if they do, they hide it pretty well. (The Curious case of Iron Banner)
Sorry for the rant. I had an emotional day.