If you want historical accuracy make spears free and turn the over head into a stab like NW, MM & WaFS.
Weight does cause stun. Heavy weapons stun lock weapons for longer.
The way to use the short fast 1h weapons is as a counter attacking weapon. A good dose of ATH doesn't go a miss either. But you don't want to chase an S key hero, it just won't work. Way easy to kick, but the speed of some of those short weapons like the Scottish Sword really work great on the counter attack. It's just a completely different way of playing with them, you have to let your apponent bridge the gap and then take them out.
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