When WoNY dropped they reworked pretty much everything in terms of exotics and gear sets.
They should bring back some of them as new sets and exotics
Obviously with some tweaks if need be but OG pestilence or Negotiators, while not top tier back in the day, were fun and with alot of the new gear, you could build some fun playstyles.
Bring back original Aces&Eights, that had the ally buffs for those people that want to lean heavy into sniper but also want to provide a little ally help. Plus some of us liked the fact that we had to play around with Lady Luck.
Orignal negotiators where you defuse grenades thrown at you and add them to your inventory would allow for some strong and fun builds. Especially with Acostas Go Bag.
Original Pestilence perk that creates gas cloud on death was literally copied for the Resident Evil event. It would just be fun to have that back in some fashion.
I just think bringing them back would allow some more build crafting and more tools to play with. While not all will be top tier gear, it would be fun regardless while giving more goodies to chase.