Everyone agreed the NW stacking were strong(capturing multiple palaces oh boy totally not glitching the game or capturing multiple dutch east india companies from the same civ), but NW can't stack at all with the hotfix. You can't get two Smithsonians as Rome. You can only get 1. The only problem this issue was such a concern is only if you start playing with 3uc and 4uc (where suddenly you have multiple chances of obtaining an unw as rome). Which is that case then hardcoding your UNW into not being able to be captured by Rome (through IsDummy) is a better issue than having to nerf Rome. I don't see why Rome has to be nerfed because of a mod overuses unique national wonders.I mean taking UBs is literally the unique part of Rome. It's also only the UNWs that anyone has concern about. (And I guess defensive buildings now.)
The concern for those elements has not been universal either. Everyone agreed that NWs were too strong, but consensus is NOT reached on these issues.
Not taking any UBs sounds like a really boring change that's not needed.