It’s an idea to fight the annoying timeouts that happen at the most important move in a game.
In the submit-button mode, the player selects a move and then clicks the submit button. That’s great for tiny phone touch screens.
Make a step further: auto submit the selected move on timeout. There’s nothing to lose: a suboptimal move is better than just losing the game.
Why this matters. When I’m reading a complicated sequence, I can’t switch back and forth between the board and the timer every second. And no, don’t suggest to use audio countdown: it’s not reliable.