1h stab is ok now, at least there is something against 2h "lolstabs".
Historically weapons like rapiers replaced typical medieval swords (
http://en.wikipedia.org/wiki/Rapier) so it kinda proves that stab damage was found more useful than the cutting one.
For bardiche vs 1h sword comparision - there are three things (on attacking side) that actually influence the power of thrust:
a) speed
b) mass of the attacking item (
http://en.wikipedia.org/wiki/Momentum)
c) size of the contact spot
Don't know how it is implemented in Warband/cRPG but the biggest speed and mass of a weapon are and the smaller (and sharper) the striking tip of the weapon is - the more damage it does. That explains why huge and heavy bardiche with relatively big tip can't be as effective as light and sharp sword.
Also if you ever fought irl using an axe or a sword you will know the difference when it comes to thrusting. Axes and berdiches aren't handy for thrusting - and of course it is possible to thrust with them (with sufficient strength you are even able to make a thrust with a refrigerator
) but position of your body while thrusting with a berdiche doesn't allow to use as much of your body mass in the process - so the thrust is weaker.
The best unreal thing now is that shield becomes instantly penetrable while you start a shield bash. Any plan to fix it?