Thanks for your reply!
Good to know about duress pin and app scopes!
Fingerprint access after switching profiles: it's buggy. People report having to use pin/pf in the first time after switching back and for some people it never turns back on. For me some updates make it better, others bring the issue back.
Amnesic profiles: the idea came from this discussion:
https://discuss.grapheneos.org/d/6639-can-someone-create-amnesia-mode-for-profiles
It's basically a profile that keeps no user/app data. It either returns to a blank profile or to a blank + installed apps after being logged out.
Mic use: it's a shame. Having the mic off except for phone/signal/WhatsApp calls would be great, specially for the phones we set up for family members who are not great privacy enthusiasts, and who won't bother to manually turn the mic back off after every call.
Oh, and what about invisible profiles, if it's not asking much?