I've been around for a while, just must have missed that.
However, I wasn't specifically looking for path that leads to your destination (albeit, that would be nice too), but instead that the tile you wish to send unit(s) to is marked in some shape or form indicating which tile is selected. Reason being, when working with depth, the tiles are not perfect squares and sometimes, the tile that you like is actually the other side of the mountain.
This is all moot if when the path is shown, it's an additional click since then you can clearly see if you have the right tile selected.