The internal balance for 2hers is just plain bad. You see a myriad of one handers (some use blunt/pierce, many use swords, at least a couple use the axes), and a decent variety of polearms in use (pikes/long spears, hoplite spears, the swingable ones, the 2d awlpike-esque ones). What you don't see are 2h axes/bardiches, 2h blunt, or any of the medium to long swords in comparison to the bastard sword line.
What needs to happen is an inclusion of more/unique 2hers, and a balance overhaul of 2h as a class. At the moment, the superior animations of 2hers coupled with the speed and generous damage output due not only to stats but also to speed bonus/ player techniques makes the bastard sword line the ultimate weapon for most combat situations the crpg-er will run into. In a group fight, you can effectively side swing, stab, and overhead. When faced with a shielder, most times you can out-speed them with double hits, out manouver them with footwork and reach, and throw out a kick if you're confident. Any one on one situation will tip the balance in the favor of the 2h bastard sword user. The 2her's mortal enemy, ranged, can be easily overcome by using a small shield.
At the moment, there's no real reason for a 2h player to choose a weapon outside of the bastard sword class, unless they are going for a niche application. You don't necessarily have to nerf the bastard sword class, but please fix the 2h weapon selection.