One of the things to keep in mind during the spear discussions is that I'm not imagining spears being used in a vacuum. I do have some ideas about staying out of reach, which would affect how a spear is used. Specifically, a combatant with the higher combination of Move + Reach gets a bonus to attack and defense. (I said "attack or defense" in the linked post, but it should probably be both; I'm also considering upping this to 2 points each instead of 1 point each.) This abstracts opponents with short weapons trying to close distance and those with longer weapons backing away, so that we don't have to track each movement or roll multiple contests between two sides to see who can move outside or inside the other side's reach.
There is a proviso, though: even though I'm not a combat grid kinda guy, I wouldn't completely ignore position on the map. If someone is staying outside of an opponent's reach, they're backing up. If the opponent presses the attack, continually maintain distance may result in being backed into a corner or pushed off a cliff/into a pit. At some point, a spearman may have to stop worrying about the advantage and charge forward, just to keep from losing ground.