Wouldn't it be cool if in Sieges, we can make troops dig in underground, and set Mines below a Fortress? The Ottomans did that in Vienna. Yes, not many Mines were used in Napoleonic Wars, but wouldn't it be amazing to use Mines? Of course, they would cost 1 turn to deploy Mines under a fort, but it would be spectacular if we could use Mines.
Do you think Mines should be used?