It is surprising - grey buttons usually mean disabled permanently, not disabled except for some uses or for some indeterminate length of time.
It changes established behaviour without a clear warning to the user.
It is inconsistent - disabling bluetooth now disconnects from all devices (except Apple ones!), and it says 'Not Connected' when it is in fact connected to an Apple Watch say.
It is inconsistent - other buttons like airplane mode or mobile data do turn off permanently.
It's not a huge deal and everyone will adapt, but you shouldn't be apologising for Apple here - this was badly done and not well thought out.
https://support.apple.com/en-gb/HT208086
The problems with this change are:
It is surprising - grey buttons usually mean disabled permanently, not disabled except for some uses or for some indeterminate length of time.
It changes established behaviour without a clear warning to the user.
It is inconsistent - disabling bluetooth now disconnects from all devices (except Apple ones!), and it says 'Not Connected' when it is in fact connected to an Apple Watch say.
It is inconsistent - other buttons like airplane mode or mobile data do turn off permanently.
It's not a huge deal and everyone will adapt, but you shouldn't be apologising for Apple here - this was badly done and not well thought out.