everyone was on Em's part. it could've been anyone on the song and they would've been an afterthought which is a testimate to how dope Em's verses are.

and I agree that Jay also goes in on the song but even then he's still just "whatever".

And you can't really say Em used a recycled verse and beat because Jay took the track and substituted Royce. So Jay knew what he was getting himself into when he did it and I'm sure tried his best to keep up.