But rapier is really something that doesn't fit this mod. There are espadas, italian sword and side sword(that one shouldn't be in mod really...), now also some early kind of estoc, those weapons were more common in renaissance than medieval, and rapier is pretty much a baroque weapon, yet later period.
Only the rapier in the mod would be too less, if it'd be added, then also there should be cuirass, fancy shirts with wide sleeves and even more fancy hats. But what is more important - warband engine can't do the 1h fencing right, and rapier with shield and lolstab it'd be just op, because that weapon would have very high stab dmg.
True that many axes in mod should be retextured/remodelled.