I'm in for everything except balls and strikes.
If we go the route of manager challenges, I say two for each per game. If he wins both, he gets another.
this will not prolong the game any more than a deliberate pitcher, the catcher going to the mound 15x for some teams, changing pitchers for every batter, a batter doing some weird shit for 15+ seconds before every pitch.
damn, we could have a replay resolved between pitches when Ichiro is batting. There are some pitchers that have a 30+ second routine before every pitch.