I think this is rather a UX bug than a feature suggestion.
Anyone who's using the keyboard for navigating through auto complete suggestions, is using, for example, the right arrow to insert the url and then can edit parts of it.
A very common example would be typing "github" and if the autocomplete shows: https://github.com/repo/project/pull/1320 but the user wants to open a different pr, so they would edit the final portion of the url, which is quite fast.
The lack of this makes it impossible to edit any url from auto complete suggestions before you visit it.
This works universally on Chrome, Firefox, Safari and I would classify it as a usability bug, not as a feature suggestion.
It currently prevents me and I think a lot of the technical folks that is the main user base of Orion right now from using the browser to its full extend.
Is there any way this could be prioritized?