If you swap your dats you can actually change a sub-handed H2H weapon to say a dagger if you want which means the game sees your H2H as a Main weapon and a sub weapon on your character, instead of just the 1 weapon in the main hand slot in your EQ menu. So my take on it is when you equip a H2H weapon there is pretty much an invisible sub weapon in that slot at least from the coding stand point probably. So when they had the idea to create grips they probably thought about making "wraps" fiddled with it for 20 minutes, decided it was too much work and gave up. That's my best guess anyway :/ wraps would be nice though.