Pass - Proton team picked up light theme recently so I’m guessing it will available in a year or so :)
Drive - had no described issues. I can search photos using its names. However, photos are not searchable through the web app.
VPN - true, dark mode only which sucks but honestly, I open it only where there’s an issue with the VPN which is rare nowadays.
What I can say it that Proton products are for somehow “aware” users, which are not discourage by occasional issues. I would say it’s a late beta state of things. I’ve been a happy Proton customer for quite few years and cannot complain about it. The best thing is that when I had an issue, I’ve raised a support ticket and within a day or two it got fixed. Or if it was an user(aka me) issue, it got explained with as much details as I needed.
I would be happy to see privacy respecting AI assistant in Proton products, especially Proton Mail. English is not my native language and every now and then I need to use 3rd party services to compose a professional sounding email. Having this built into Proton Mail would have made my life easier. Also, having a feature that detects and labels faces and features in the pictures stored in a Proton Drive would be an amazing addition.
Flatpak is not the answer here. For example, flatpak version of codium doesn’t recognise terminal settings out of the box. Since such trivial thing is a problem, image how difficult it would be to use it with various file systems, sync options, etc.