I think boosted Experience, Rares, Happy Hours and the ability to exchange money for maxed gear made Ultima players too spoiled over years, including myself. That's why I don't play since a while, just visit forums to check what's going on.
Now there isn't much reason for veterans players to stick on after they made everything they wish in game. And reversing all of such boosts would make people complain even more, it is difficult to do anything at this point.
Countless suggestions from the playerbase, including me, has been already suggested to perhaps try to mitigate this issue. This thread has thousands of suggestions, good and bad ones, that are way too difficult to implement, or depends on major's staff decisions.
The truth is, you all just don't want to accept we already had enough of PSO:BB, even if it was another server, the core will be the same game. I don't think any other MMO has been supported by fans that many years. It is actually surprising people play Blue Burst in 2021, an update that is 17 years old from a game that is almost 21 years old. So idk, if any you are trying to find something brand-new, then in my opinion PSO:BB isn't for you. Play this game for nostalgia and accepting there won't be much else to do besides hunting the same items and gearing your character towards level 200.
If only Lipelis was a GM, nothing of that would happen ...