If you go to Settings -> Appearance and enable show quick actions, you can reenable the 1 click copy password again. Enabling compact mode and disabling animations also helps a lot.
Yes, but then you have to click the little "Fill" button. And if you enable "Click items to enable autofill on Vault view", you have to Rightclick -> View to edit stuff.
cmd+shift+l, or ctrl+shift+l (lower case L)should just autofill even the totp fields (notably and annoyingly not totp for microsoft auth though)
If you enable Autofill > Copy TOTP Automatically, when you use that keybind it'll copy the TOTP to your clipboard so that you can paste it in when prompted for it
I think you can fix this with the setting "Click items to autofill on Vault view".