Stormonu
NeoGrognard
If I recall, you could move up to 1/2 speed and still attack in 2e.
There was also some silliness in that a 2e round was a minute or so in length, so facing presumed that for the entire minute you had your back turned. Third edition tried to streamline things down and also presumed that you occupied all points of the square at all times. That assumption sort of necessitated acknowledging that you weren't facing any one direction. Since it also streamlined play, I find it a net positive design.
I agree with this; in 1E/2E, I seem to recall that if you were not priorly engaged with another opponent, you could turn to face the attacker, and I seem to recall rules where approaching the opponent, you had to fill up the front, then side ranks before you could get a shot at their back.
Still, there are instances I miss in 3E of being able to "sneak up" on foes or players who are "otherwise" engaged (I'm not talking flanking, I'm talking outright catching an otherwise engaged target in the back).