Agree to the minimum pitching rule of three batters or to the end of the inning. Another version of this rule would be to limit the roster size of pitchers to 11 or 12. This would force managers to think and make strategic decisions instead of bringing out a LOOGY whenever an opportunity presents itself.
Also agree to reasonable measures for pitchers and batters to abide by to lessen time between pitches. This gets tricky though because there's always a work around like throwing to first if there's a runner on.
Disagree to the reduction/elimination of warm up pitches for starters/relievers. As someone who use to be a pitcher (not a good one so I'm not bragging), you need a feel for the mound and depending on what happened during your team's half inning and the weather, you may need those warm up pitches to get loose again. A hitter has a batter's box to warm up so it's only fair a pitcher gets the same privilege, right?
Disagree STRONGLY to the infield fly rule being changed. It was implemented over a hundred years ago for a reason. Any quick Wikipedia check will show you why.
Disagree STRONGLY to the aluminum bats, for the reasons that other posters succinctly posted already.
I would approve of eliminating interleague games, however its not going to happen especially with 15 teams in each league.
I agree with the 15-day contract rule brought up. Another idea for games that go beyond a certain point, say 14 innings, you get to access a "reserve player" or allow for one or two players taken out to be put back in. If there's a great 17 inning pitching duel, I don't think anyone wants to see it end because a non-pitcher has to pitch.
I agree that the Blue Jays should be playing the Tigers and Indians more than or equal to the Yankees and Sox. Those are the this team's natural rivals. However baseball wants to implement that is up to them. Maybe Oakland moves to Brooklyn, Minnesota moves to the west and the Jays to the central and it all works itself out.
I agree that teams should be able to trade draft picks. At least picks for picks on draft day so teams have the flexibility to move up if they really covet a player.