You're already more than halfway there and in the examples given, you're not just getting 1 drop to sell, so its not just a 1 to 1 thing. DFB rewards around 5 or 6 per run, not to mention any salvage you can sell.
As for the dangers of having SOs become commonplace at lower levels, I would say they already are commonplace via DFB/DiB/Summer BB etc. and it hasn't destroyed the whole IO balance.
I never said or suggested anything of the sort with regard to the amount of work involved. I'm quite sure it isn't a simple thing to do. All I've said is that I would support the idea of removing an antiquated piece of the game that has no value anymore and replacing it with something better. I believe that is worth discussion.