Golden point - just not necessary (apart from cup ties /play off games).
Interchange reduction is fine but with blood bin and head assessment, we wont notice any difference (apart form more blood/head interchanges).
Shot clock - Assuming this is time to take penalties, conversions and drop outs, then, great and well overdue. However, for this to be effective, they will need to find a way of preventing the endless injuries (usually with miraculous recoveries) that accompany these parts of the game.