I humbly do not think UO needs to copy anything WoW does. UO owns a niche market and they are profiting off of the players they have, they are releasing gacha content like colored nightmares for a limited time only, and they are thriving. There are events all the time and new content that is not behind pay walls. You can play or you can pay but for the most part you are not pay to win in this game, yet. Asking the UO devs to give us something equivalent to a luxury brontosaurus, I guess? I mean, I hope not.
I guess it doesn't matter, because I am not spending $100 for anything in the game, but others would, and that's how the F2P market goes; except we are not on a F2P model, so if it is a vanity mount? Ok, fine. But if it has stats, and they lock it as a pay? Gross, hope not.