Previously I've posted all the stages of Orion as screenshots. Attached now is a video of the Chrome iClouds Passwords Extension running in Arc. One video shows with the extensions "Autofill" setting enabled, and the other manually requesting the login fill from the Extensions icon. Both methods allow for multi account selection and filter to passwords for the site. It's a much much simplifier and faster UX flow than Orion's current implementation.
The autofill option opens the overlay on site load, so it's 2 clicks to login. I think if you have only one account for the site in Passwords, then it's as simple as the browser native password autofill.