The idea about moving the mound is obviously in response to increased velocity and the effect its having on hitting. I really can't believe that they are going to make some guys try to do it.
One reason that pitchers are able to throw harder is that they pitch to fewer batters than they used to, and make fewer pitches when they are tired and wearing down. So why not make pitchers pitch to more hitters by limiting pitching substitutions. If starters actually had to go through the order more than twice offense would almost certainly improve. Likewise, the longer a reliever has to stay in a game the more he'll get hit.