Might as well use this to list my problems with the "story"
1. Who are we? We are woken in Old Russia by Dinklebot. Were we a guardian? A normal person "chosen" to be brought back? We must be a guardian to start in armour right? So if we are a guardian then where was our ghost? Why didn't he bring us back? Was Dinklebot our ghost and spent all this time looking for us? Is Dinklebot a new ghost? Did Dinklebot have a guardian who fell and he decided not to revive him/her? How long were we dead?
2. Darkness this, Light that. If we are to assume that in this case, Light and Dark aren't forces of good or evil but of matter of some kind (Ghosts are born of the light, guardians gain power from the light of the Traveller etc) then what exactly is The Darkness? Are all the enemy races the Darkness? Is it just the Vex? The Hive? The Fallen and Cabal seem like they'd be alright without us killing them. Like, the Fallen (due to their name) seem to have once been a great race now reduced to a shadow of their former selves, was this due to The Darkness? Was it because of us?
3. What exactly did we kill(?) at the end of the story? They say it was a thing draining the Travellers energy and now it'll be able to slowly heal or something. Why was it left there so long? Why did no one try and stop it if everyone knew where the Black Garden was? Why are we so special to be able to take it out single handedly?
4. Why is the Stranger from the future? The gun heavily implies this by saying something like it contains materials not made or discovered yet or something. If there is time travel and she is a time traveller (along with her radio buddy) why did they come back to help us? She says she isn't a guardian. Is she from a future where the Traveller dies and so she came back to save it by pointing us in the right direction to kill the black heart thing? Is that the thing she doesn't have time to explain? If so does that mean the Traveller isn't evil and is in fact the light and the shit is really as simple as kill the ugly aliens and ugly robots because they are bad because they just are shutup?
5. What are the exo? It's probably in a lore card but they had the potential of being cut apparently so why isn't there an explanation in game. Why am I an Exo long dead in Russia? Why do Exo come in male and female? If you're an awoken why were you in Russia? Were there Awoken back then?
6. Why is everything "centuries" old? Nothing is newer than that.
7. Why no more missions like that one sword one?
8. What's up with Rasputin? What is he planning?
9. Why was the Hive on Earth such a big deal when they are around on the surface in a bunch of place? How did one shutter keep back an army?
10. Why can no one else do the jobs you've been doing? They don't seem that impressive and haven't been attempted in "centuries" for some reason. Are the other Guardians lazy?
11. Why do none of the other "characters" seem to care when you do something impressive?
I can actually answer... most of these.
1. While we don't know
precisely who we were, we do know that we probably weren't a Guardian; the armor we're wearing at the start was apparently fabricated by our Ghost right before he woke us up, according to the item descriptions.
2. The Darkness is one part conceptual force for evil, one part actual, physical force. There's a number of theories proposed in the Grimoire about the latter, but the former appears in the way they refer to the various alien races as being "servants of the Darkness," when clearly most of them are working at cross purposes. It's sort of a catch-all term for badguys.
3. This one's one part mystery, one part obnoxious. We didn't actually kill the thing in the Black Garden, just drove it off. Presumably it's the physical component of the Darkness, but there's no way to be sure. As to the rest, no clue. Presumably it's because we're the Chosen One, but the story is sort of schizophrenic about that.
4. Dunno. I didn't even notice the thing about the Stranger's gun, but she herself is not necessarily from the future; time travel does seem to be a thing in the 'verse, and there's some mention of a ship or... something, so maybe she's just affiliated with time travelers?
5. This one I'd actually file under "legitimate mystery." Nobody knows. It's not like a lot of the other stuff, where everybody in the setting knows but nobody is willing to tell you
6. Ever played/read any 40k stuff? Everything there is millennia old. Seems fair to me.
7. Because Bungie is apparently really, really bad at time management (see: the Halo 2 saga), so they ended up having to do a lot of copy/paste.
8. Rasputin is a Warmind, a super-AI that was tasked with defending the system before the Collapse that apparently managed to survive to the current day, and is beginning to reassert it's authority. It would've been the coolest mystery in the story, except they totally flopped the landing in The Last Array, so it's tough to care at this point.
9. Apparently, nobody had any idea that the Hive were on Earth before your Guardian stumbled on them. Seems Old Russia isn't exactly a popular tourist attraction ;P
10. Not a damn clue. They seem to be deemphasizing your "chosen one" status in the story, except you keep doing chosen one crap over and over.
11. Story seems to have been tacked on at the last possible minute.