Ideas and suggestions.

I requested this feature for my template, which I plan to create in the new template editor. This feature could also reduce game time on Jebus. As for the other templates, players can continue to play as they always have; no one is forcing anyone to do anything.

So that the OH (presumably "Observer History" or similar) saves the locations of the blue player's heroes, and for the red player, they remain in the previous day's location until they reach the current day (it seems this is already the case). Similarly, for the blue player, the red player's turn is also from the previous day. Upon meeting, the OH rolls back, meaning everything the red player did (if the blue player attacked) is undone. This way, you can play the entire game with the OH, and without replaying the OH as it is now; only the turn of the player who was attacked at the moment of the attack is rolled back, and then the game continues from that point onward with the OH.