Ohtani wouldn't be the DH though he would be hitting in the lineup as the P spot. The DH rule doesn't even mandate using the DH, it just removes the ability to force pitchers to hit as a pitcher in the AL, so a universal DH rule would just remove the forced pitcher spot hitting in the NL. Teams would still be free to choose to allow the P spot to hit if they had a guy like Ohtani, but when he is removed as the pitcher, no he could not be allowed to remain in the game as the DH, because the DH spot wouldnt exist on the lineup card that day.
I'm torn on the shift to the point of apathy. If they want to do make general rules about where an infielder has to start the play, I don't really care. Anything short of drawing a circle on the diamond where each player has to stand is probably not going to change anything.
I don't particularly like the runner on 2nd in extra innings, but I understand why they thought it was a good idea for the regular season to keep the games shorter, keep teams from getting their entire pen worked over in one game that screws them for a week. Yeah, it's fine.
7 inning doubleheaders... same as above. Don't really like it, but understand why it's felt to be a good thing in the regular season.
Pitch clock needs to happen. It's pure dogshit that a pitcher and catcher can't figure out which 1 of 3 or 4 pitches can be thrown in even 25 seconds from the time the pitcher gets the ball back from the previous pitch. The human rain delay pitchers can f*** off. Keep the game moving.
I'd never thought about limiting pickoff attempts as a thing, but the more I think about it, the more I like it. It would quite likely lead to more scoring, which is great in my book.
Robo umps behind the plate are a f***ing necessity. The sooner the better.
Tweak the rule on challenges also. Who cares what the call on the field is... the replay officials only goal should be to confirm whether or not the runner is clearly out. Clearly. Like 0 doubt. If it's not conclusively out, he's safe. It's not hard and it should not take long. If you can't determine if he's out after 3 minutes, safe. Time limit on that as well.