Upon thinking about it. Doomsday shouldn't have been used in this film.
It should have Bizarro.
They should have saved Doomsday for the Justice League film.
Nor should they have killed Superman yet. I know it's not my movie, but WB kinda blew their load early with this.
This... Bizarro would of made more literal sense... shoot, I rather it would of been them fighting Luthor in his mechanized suit. But they wanted to fit the Death of Superman storyline in it so it is what it is.