From the very beginning I don't think I was completely sold on Destiny.
First of all, I always thought the Halo series was very same'y in its gameplay and design. I didn't really expect much with Destiny either, judging by the Halo series.
And with the title like "Destiny," it felt a bit pretentious from the get-go, like boasting almost. All the pre-PR doesn't help either. Just made the set up and burden to deliver even a greater thing to bear for Bungie.
It obviously has so much potential. Like others mentioned, I just don't think this game can be patched and upright everything. There may need to be a serious overhaul like FFXIV and a Realm Reborn.
Others have said this, but I always felt that Destiny would've been really great IF there was a separate single player campaign, even if it's with the traditional linear story telling, plot, cut scenes, etc. we see in most AAA games. And the current state of the game could've been its MP portion, which could be built upon with dlc, expansions, etc. The SP can have the beginning, middle, and end story while the MP could expound the world a bit more with the expositions while doing missions. Could've been great!
That way both MP and the promises of a great story could've been met and satisfy consumers.
It's obvious from a fundamental game design standpoint, (my opinion) it's almost impossible to have a really good narrative and a MMO or a MP focused game at the same time. I keep reading "Destiny sucks as a solo game but great with friends." It has to be one or the other.
That's just what I'm taking away from all these impressions I'm reading, both the negative and positive.