When SAB was closed in the summer, they allowed BCV guests to use Luna Park. It’s not considered pool hopping when Disney does it because of a shut down of a pool.
In this case, they may allow BWV guests to go to SAB as a backup with the slide closed, However, the fact that at least the pool remains open, given capacity limits, it’s very possible they will not so SAB is not overcrowded.
Pool hooping, in all other cases. Is indeed suspended right now and I’d be surprised to see it back.