Those changes, apart from occurring so long ago that very few people even knows they were once actual rules, addressed actual problems. What problem is being addressed here? Pace of play? Pace of play is a made up problem. You want to fix pace of play, cut out some between-inning advertisements. But of course they’d never do that. They want their money.
Is it to prevent overuse of bullpens? How about something sensible like not yanking your starter after 2 pitches or adding another roster spot or two. Something that doesn’t completely change the game. Why is this rubber on second? Why is he on base at all? He didn’t even bat and he’s not a pinch runner. Why should the pitcher be penalized like that?
This was a rule to pander to people who don’t like baseball.