The reason Paul Heyman was kept away from Cesaro on Raw was because they are planning for Brock Lesnar’s return. I think most fans probably figured out that the “Plan C” that Heyman was talking about was Lesnar.
Lesnar may be back as soon as Monday’s Raw in Miami. The main focus for Heyman will be Brock Lesnar going forward. On the show they said that Heyman was fired by Cesaro so we’ll see if they follow up with that. There was talk at one point of having Cesaro turn babyface and feud with Lesnar but those plans may have changed. Plus, Lesnar is on limited dates with WWE so they might want to save his dates for his upcoming feud with John Cena.