I don't have multiplayer, hence why I said, why doesn't anyone know how to screencap? But frankly, it's a war simulator, not the best, but decent and fun.
When is the last time you knew men in armor weighed down with multiple weapons making 3 foot vertical leaps? You are suppose to find high ground as an archer, not try to use the limited game mechanics to find a place that it's hard for the other team to reach.
The fact that there is discussion about it, frankly, says a lot on the subject.
If you could get a horse on a castle wall, and run, jump it off, dismount in air, and land on the roof of a lone building, would you call that viable!? NO. You wouldn't. This game isn't Assassin's Creed or Super Mario Brothers, you aren't suppose to be platform jumping to relatively inaccessible areas.