Unless Sacramento has high conviction of the law surviving court challenges, they shouldn’t reättempt it. Its mere discussion is a powerful forcing function for decampment.
They may yet expand them further, we'll see.
It would be nice if the FTB contacts your bank about contacting you before the seizure, but that's not what they do. It can be particularly inconvenient if they seize all of the funds (and they will if that's what is estimated to be owed), as it may be difficult to hire a CPA in that event. Hopefully the paperwork is in order or a CPA is already hired.
Edit
My friend recently had his funds seized from when he moved out for the 2016 year. He got 1/2 back but his paperwork is not in order & got cleaned out. Currently does not have enough to hire a CPA to get the rest.
Btw, I had already done several of the steps listed in https://www.modernfp.com/blog/leaving-ca
I will never move back to CA. Another word of warning from a CHP officer. If you happen to drive in CA as a former resident, make sure you have your out of state license on you. If you forget your wallet, you could be cited for driving with an expired license.