I've seen plenty of two handers, and they usually carry a shield for getting close to an archer. Every melee infantry should have a shield, really. (Which is why I liked the fact that shields did not have any skill requirement in Native SP and anyone could equip one.)
Either, I suck at shielding (which is totally plausible), but I don't like the idea of "turtling up" unless I'm being mobbed by 6 foes at once.