Hello! There are a few customization options in 1Password X that I think you’d find helpful. If you’re not a fan of the inline menu, for example, you have the ability to disable it on the 1Password X settings page.
I totally see how offering to save a Login after your credentials are accepted would be convenient. We always put security first here at 1Password and when we save a new Login item, we save everything on the page and run a check to make sure everything we saved matches when we go back to fill your Logins. This helps to make sure your data only goes exactly where it’s supposed to. So after some trial and assessment we determined offering to save after populating the last field in a form is the most secure way to ensure the proper data is saved (for now).

We really appreciate you sharing your feedback because it helps us continue to improve 1Password X. Thank you!