"Explore" has to be one of the buttons that is clicked on the least. Even if someone does a lot of exploring, they only need to do it once to the unit, then it goes off on its own.

I accidentally started a hero exploring, instead of Guard. Tired, didn't notice I had done it. A while later, I realized was missing. Had to go find it on the map.

Similar to "Guard" mode, I'd like some easier way to notice I've lost track of a unit, and to track it down.

But most of all, I'd like to not accidentally click "Explore". Ever again.

Actually, I've never clicked "Explore" intentionally. I would be happy for an Advanced Option that removes it from the unit menu.