Try this.
Go on the duel server, and get a cooperative partner, tell them to stand still and not block.
Walk into them until your noses are touching and you can't walk forward any more.
Stand completely still, and swing your 2h sword.
Full damage, no penalty for face-hugging with a 5 foot long 2h sword.
In fact, 1h weapons are much more likely to glance from being too close, this has to do with the animations, not the damage.
So, if you weren't too annoyed by the format of this post to finish it, I hope you found this piece of information interesting. (It's a misconception that 2h weapons are useless in super close range, and it can not be considered a disadvantage for them.)