Address bar reveal should also get focus
I have set a function key to turn the address bar on and off. When turning the address bar back on it should get focus so you can begin typing at once.
You want to start using the keyboard anyway.
@Izzy If you want the URL field without wasting space with the address bar use the Quick Commands dialogue (F2)
If you set Ctrl L to focus the address field, and Ctrl Shift L to toggle the address bar, it may be easier for you, but they are two different commands. One would not necessarily want to focus the URL field in every case.