Thank you SO much for these questions! I absolutely love talking about these things!
I think this is a super cool idea, actually. Like sometimes people will just end a turn just scooting to the left or something, but this kinda adds something USEFUL to do when there is no more options.
I think this is an excellent homebrew rule, and MAY be added in the future (with credit). That’s a really interesting thing in game design that has come up; what to give the player in instances where nothing is occuring, and I think this fits amazingly.
If and when it is patched in, please feel free to mod the game with this excellent suggestion! I LOVE when people homebrew things with my games; it shows that people care about what I created!