Rusev rules, Cesaro rules, everyone involved in the main event of that is a really good wrestler.
That said, they took a guy in Cesaro who was VERY over in that building, put him in a US title match with an over heel. Have a very much not over heel cost the over face his title match. All so a face who the crowd hates can run in and cheap shot said heel after the heel worked a hard match.
I'm not sure what was really gained in that main event other then "Man, can Rusev and Cesaro wrestle some more?"