I have an idea for Omen!
I think the happy medium would be to make Omen a placeholder name for potential Champions and abilities. Take the name Omen, let the body die, and then release him onto the PBE every couple months to test reworked abilities or newer abilities are are still largely abstract. Have an idea for a kit and you wanna try it out without building a whole champion around it? Add some fixings to a genderless polygonal monster and release it onto the PBE under the name Omen. It gives the community a small window into what the devs are thinking about (feels good, man) and it lets you test a kit you don't want to commit too many resources to without testing.
Plus, the name Omen becomes a pun. Puns are nice, right?