Brief Interlude

Work has interfered with my schedule. Just some brief thoughts in passing today. In a period of lucid dreaming (I think), I was picturing a valley with broad mountains stretching up out of it, covered in tall fir trees. The important point was that the hillsides were steep. It put it into my mind that even when encounters are placed in the mountains, it always seems to be easier to meet on flat ground.
Yet when moving uphill through mountains like these, the ground would rise steeply underfoot. This would complicate maneuvers on the battlefield. I think striking upwards could be managed without difficulty, but striking downhill would become more difficult. The tendency to pull up would mean attack rolls would be made with disadvantage.
The trouble here is that striking uphill would be easier to hit... someone's feet. They could dance away. Perhaps half cover and a +2 AC bonus for the uphill defendant, and disadvantage on AT made downhill. That seems reasonable.