I understand. It is time to talk with devs and community. It is time to ask them if it's possible to do and how difficult it would be.
Ps. Right now, I would suggest to do nothing with upvu account, just let it run as it is. I remember the POB drama, when they blocked azircon account. The price of POB token went down from 2 HIVE to 0.2 HIVE
I'm in touch with the devs and there are still many gitlab issues unfinished before we can add more to the list. We wouldn't block the account, just new delegations to it via the UI, they are welcome to spin up a new ui and get their users to use it, or have users use the cli wallet to delegate.
maybe simple warning about upcoming changes on delegation pop up or main wallet page would be enough?
The thought of this concerns me too. It appears that a lot of the Korean "investors" have bought Blurt in order to use UpVu. That's going to be a lot of Blurt for you to prop the price up.