OK except for the last point. Remember the early days of replay review? and the chorus of announcers saying "the important thing is to get the call right"? My favorite case was the USC/Oregon game 10 or so years ago (ok, maybe 15). The replay review (on a run-of-the-mill kickoff), took 22 minutes. The important thing is to keep the game flow going with as few interruptions as possible. (To me, umpires with head-sets on is as boring as mound visits, or a player or manager storming around, kicking dirt, and lamenting the Injustice of the Universe.)