It's very much a "death by a thousand cuts" situation - I'm not a fan of the removal of 1Password mini which was my primary interaction with 1Password, especially for the common workflow of password generation/account lookup.
It seems their focus is to drive this into the browser extension but that doesn't cover all of my use cases - I very often need to generate a login password _outside_ the context of a browser and doing so now requires me to open the application and create a new password and save that record while before it was one click away in the menubar.
I'm also annoyed that we're no longer able to define which vaults are included in "all vaults" and the inability to simultaneously disable the browser extension from injecting their UI into websites (the login icons, blue input fields, etc) while keeping the prompt to save a login when a new one is detected.