I kind of like the idea of no auto-blocking. Maybe you could keep that as a server option? Also, is there anything that can be done about movement and saber attacking? I think that (especially when using Red stance) that the player move around way too much. I'll go to do a low sweep attack using down-right and walk out of range. It would be interesting if when you were "in range" of an opponent you kind of froze to the ground only allowing saber movement with the move keys. If you wanted to break away you could double tap a direction and start walking that way. While locked a roll could be performed by pressing roll once and will keep your opponent targeted (Legend of Zelda: Wind Waker) and holding a directions and double tapping roll will do a break away roll (or even reverse those two buttons; that might be easier on the fingers).
What do you think about that kind of a saber battle system?