I must admit that when I've bought a product in early access specifically advertised as liable to (in fact intended to) undergo significant change, I'm relaxed about this. I expect things to change and I don't expect to be kept up-to-date of everything Larian are changing their mind about (or considering changing their mind about) in the course of it. And on something like the party lock, I'm happy for them to make an announcement (if there is one) at whatever time they want.
I'd certainly be
interested in their changing thought processes and clearly there's a risk that if someone has read something in the FAQ in the past they'll keep repeating it believing it is true not realising things have changed. But then they might miss an announcement and a tracked changes version of the FAQ could get messy. And explaining every change and rethink could get really onerous, especially if you're still not sure exactly what the final decision will be, so I will happily wait for a "making of" deep-dive into the development process

.
Of course if things changed to the extent that BG3 became a totally different game than what we'd been told it was when we started EA, tthen I'd take a different view. In that case then I absolutely would expect to be told (and the opportunity to get my money back)! But I don't think we're anywhere near the ballpark for that.