Although a bit tangential, I was commenting with @stelagel how I imagine we could have a weapon/game difficulty overhaul:
You would need to have progressed through the whole research tree before being able to get a legendary weapon because you simply couldn’t kill a world boss before that.
Now, add to the above idea legendaries coming from dungeons being the best, not in terms if damage, but each with a specific trait that would make them desirable. One could greatly improve your capacity to carry weight, being like a bal-pteor weapon, other could enhance thrall damage, etc.
Telith weapons could give you the redeemed silent legion thermal resistance, for instance, setting you up to progress to the frozen North and the Volcano.