Good points, @Barnack 
I refer Realism as interesting gameplay mechanics, “not insanity” or “very intensive”, to be clear :D.
This is a game after all, for example about the stash “in sync” (if a mod emerges, or a independent container system is released with a major patch, with own lockpicks and keys, chances to be robbed), I think will be good.
On topic, about polearms and horses, I would “sacrifice” some Realism accuracy to equip and carry polearms, and for more enemies on horse (horse were the Ferrari of that time, I think), expensive and a class symbol, like you said with swords.), but as is a personal decision (customize my game), I understand, some people disagree.
@Bullethead, you are right, polearms and javelins are not the same, related but different, for me horse combat with polearms is a good way to kill Cumans :D, but I agree with you “in house” development is needed to adjust combat mechanics, animations, etc becasue Restore Halberds mod seems very WIP as you said, but it works (for people who ask) @korbel05 , at least to test.