exploits totally have a very high priority for us
Without discrediting the rest of your reply, I think this right here is the problem.
I personally haven't used that exploit because I'm not playing the game atm but when it came up I knew immediately that the fix is imminent.
Why exactly do you consider some players getting loot at a faster pace "game breaking"? I know you're aware of all the discussions around the dissatisfaction with the amount of RNG, gear sets, exotics, and whatnot. Things like this can ease the pain for your players a little, at least until you have a real solution to the issue ready. But instead of letting them farm for a week you've given everyone the impression again that players getting too much loot is a "STOP THE PRESSES!!" kind of emergency scenario - and I don't think that sits well with a lot of players.
A lot of time in a game like this it feels like the community and the developers actually turn into enemies rather than allies, and priorities like this amplify that impression. I'm not saying that's your fault, players like myself are just as much to blame for this, but it could be so much more productive and constructive than what we have today.
Saying that I just wanted to let you know that your communication efforts don't go unnoticed, and having worked as a community manager and in QA myself I know how endangered the species of "Chatty Devs" actually is.
I might not enjoy or play the game right now but I do enjoy a developer of a AAA-game talking to players like human beings. It's a sad state of affairs that this is such a rare occurrence but big up yourself for being real.