What I'm basically saying is that the pitcher would be treated special. There would no longer be a pitching slot in the batting order. Ohtani therefore wouldn't be technically pulled from the game, someone else would simply come in to pitch. Once a pitcher was removed though, they couldn't return to the game again as a pitcher (to prevent possible nonsense).
Totally agree on the challenges. They also need to implement the tennis system for automatically calling fair/foul.
Also, while we're at it, fix the damn rule regarding losing contact as you slide across the bag at 2nd and 3rd. You're out or safe the instant you first touch the bag, and remain that way unless you lose contact due to moving too far away from the base. As long as some part of you is on or over the bag at all times, you're good.