con: rusev is not as good as aj styles

Don’t take this the wrong way; AJ Styles is simply in a league of his own. As talented as Rusev is, Styles is simply that much better. While the Bulgarian is undeniably great in his own right, I don’t think that he could have a good match with someone like Jinder Mahal. On the other hand, Styles did just that.
The Phenomenal One brings out the best in everyone he faces. Several people have had some of their greatest matches against him. John Cena, Dean Ambrose, Shinsuke Nakamura, Roman Reigns, Finn Balor, and others are proof that Styles makes a talented wrestler look even better.
The Bulgarian Brute can’t elevate talent the way AJ does. That’s not a knock against him; it’s just a fact. The obvious solution is to not put people who can’t wrestle in the title picture, but the risk is certainly there.