So what does the lolstab and dragged-overheads (or whatever you call them) add to this game?
It forces you to consider more blocking directions when defending, it makes it somewhat more difficult to tell which direction to block, and it allows a player to threaten every enemy near him within stab distance (allowing a player to punish inexperience and carelessness).
Why can't we come up with some mechanics that add to the complexity of the game without stepping outside of reality in an otherwise fairly realistic melee combat simulator?
Primarily because adding deep new mechanics without access to the game source code is akin to building a sI love youcraper while looking though a microscope.
I'm all for changing melee if it increases the depth of the game. These changes don't do that - they only remove mechanics, decreasing the difference in effectiveness between a moderately experienced player and a very experienced one.
Combat should ideally be as deep as Starcraft II, or Street Fighter 2: Turbo, or other highly skill-based games. No matter how much you practice there should be limitless room to improve, and no matter how good you get there should almost always be players who can completely trash you.