To address the concerns about 1Password X...
- We have desktop integration in beta which can help with point #1: https://discussions.agilebits.com/discussion/101231/introduc...
- Our security model has never relied on the sync service that you choose: https://support.1password.com/1password-security/
- Last time I looked into the Cmd+\ issue the primary difficulty was that not all browsers (Chrome, notably) supported \ as a keyboard shortcut for extensions. The reason we are able to get around this with the "traditional" extension is that 1Password for Mac is actually what listens for the shortcut, not the extension. The same functionality is still possible with 1Password X, just not with that specific shortcut.
- 1Password for Mac can be used with the subscription offering. It isn't necessary to use 1Password X. 1Password X is a great alternative for those who cannot install desktop software, particularly those on ChromeOS or Linux.
I'm sorry to hear you're no longer using or recommending 1Password but I hope that helps address some of your questions/concerns.