I believe there actually is a damage penalty for using anything other than lances or 1h weapons on horseback. 1h/2h type weapons (morningstar/longsword) get 25% reduction and anything else including LHB gets a 50% reduction which hurts it quite a bit. Even with teh damage penalty teh morning-star still hits alot harder than any other weapon from horseback (It ties steel pick though), but the LHB cant really take a 50% reduction and still be good with cut damage. Using a slow weapon from horseback is hard i know, but its something you get used to and once you get it down its not so hard, but LHB is pretty slow. This is all assumeing the crpg damage calculator is correct, dont know if it is.