I always thought Zava was their way of showing that Ted, Beard and Roy are struggling / regressing without Nate to contribute on strategy.

If you go back to season 1 pre-Nate’s contributions, and Ted and Beard have the team funneling the ball to Jamie on at least one occasion.

Hiring someone new, Zava, and regressing to that strategy shows that they need to find a way to fill the niche that Nate once occupied.