If they want a real sports like presentation you can do that without it being corny. Look at New Japan. Everyone on the roster looks like a real fighter. They have differences in character and moveset but they all look like they can beat someone's ass and they look current.... not corny and dated.
I like 'The Fiend' because he gives me some of that old school early 90's fukkery and he's good at it but he belongs on RAW. Why he was drafted to Smackdown, I don't know, I like the Smackdown roster but I don't think shyt like that is gonna fit on a 'real sports' program.
The roster should just be Roman Reigns, Charlotte, Sasha Banks, Ricochet, people who actually look like athletes....