IMO, despite its flaws, 1Password is still the best password manager when it comes to UI & UX.
I think Proton Pass’s UI & UX are pretty darn good, but because I am used to 1Password, there are still a lot of features missing. I’ve shared most of them here.
One thing I did not explicitly mention in the link above, is that I would also like Proton Pass to sync the desktop app to the browser extensions, like 1Password does. I primarily use the desktop app. When I unlock the app on desktop, I am automatically unlocked in every browser extension. That is super handy to me. First because I don’t want to have to type my password multiple times within seconds of each other on my computer, but also because I use multiple browsers simultaneously. This feature is a must for me.