Then we should go after Dybala
only if we are selling Neymar. We don't need Dybala now but we will definitely need Iniesta replacement by next summer.
as for Pogba, I don't think its the right move for him. Both Modric and Kroos are better than Pogba at the moment and for him to accept going to Madrid to be rotational player is something I can't see it happening. Kroos, Modric and Casemiro are all occupying that position with Isco, James, Vasquez all in that No 10 role. No room at Madrid unless they are selling one of (Modric/Kroos).
As for Juve, they are building strong team but losing a star player like Pogba even for what have been reported (120m) is a loss. They will never attract a star player of Pogba caliber to join a serie A team. They can attract few good players but not top players.