He was involved alot in the 2nd half, and he didnt need to be, he could have easily have stayed, watched the game, and gone home and decided what to do.
Instead, he noticed what wasnt going right, got instructions sent down, and I believe the Yacob sub was his instruction, and Sess staying on the pitch was also his doing.
How often have we seen Sess last 70 minutes, yet yesterday he lasted 90 and was a useful outlet late in the game.