We are a largely baseball-centric family... some of these ideas I like, at least in concept.
First and foremost is the season should be reduced. 162 games is too many... and that's something I've been preaching for years. It will never change of course, because baseball is more tradition driven than any other sport... by a mile. But nevertheless, the season is too long. Even cutting down to 120 games would be a huge improvement.
Limiting pitching changes would be interesting. Never considered that... though I'm not sure 2 would be enough. I'd suggest at least 3.
3rd foul ball and you're out? uh.... no. No changes there.
3 balls for a walk? Again.... no. There is nothing wrong the rules around an AB.
No ties in baseball.... that is just sacrilege. You play til you have a winner.
The winner of the all star game determining home field advantage in the WS was the dumbest idea ever in sports.
As for the DH rules... I don't really have a strong opinion on this one. I've always been an AL guy, as a fan of the Rangers.... but I can see both sides of it. From a purists point of view, I can see why many hate the idea of a DH.... On the otherhand, as discussed earlier... pitchers generally suck as hitters. They usually see about 3 pitches then have a seat. It's a waste of everyone's time.. and it effectively creates an 8 man lineup. I think that's silly, so the idea of the DH to at least get you 9 legitimate hitters has merit.
Something else I'd like to have considered is limiting the number of pitchers on MLB rosters. I suppose this drives to a similar end as limiting pitching changes. These days, teams are lucky to get 5 full innings out of their starters... they pull them early... then go to short relievers... long relievers... closers.... etc. It's all too specialized. I'd like to see a limited number of pitchers on a team, forcing teams to pitch their pitchers 1) longer in games and 2) more games per year. 5 man rotations aren't necessary.... we're treating pitchers like snowflakes. Yeah... I get that velocities have gone up and movement has increased, but c'mon... man up and pitch.