It would be nice to integrate a restart system into the HD mod (not just for Overlord mode). So that both players have a "restart" button, and when clicked, the map is automatically recreated, and the game immediately starts with a new layout (this would eliminate the hassle of exiting the game and setting up the map settings each time). You could also add a restart counter (when the restarts run out, the button automatically disappears).
P.S. By the way, with such functionality, a new feature appears - a mutual restart. If, at the end of the blue player's turn, both players click the "restart" button, the map is recreated, and no one's restarts are spent. If only one player clicks, their restart is spent. (If playing without Overlord mode, this will slightly prolong the restart process, but it pays off in the time saved on manually recreating the map).
Here's another idea: when loading a game, add the ability to change the timer with the mutual consent of the players.