Actually the 'doubling' that tone describes was done out of the work to 'sort out arrows'. In order to keep arrows under control (and we're talking here about the common light and not overly effective arrows of the ancient world) they had been made a bit too inaccurate. This made them fly all over the place and cause cases of rather silly fratricide (brought home to me in my little Sarmatian sojourn when a couple of HA units at range either side of a target managed to kill some of each other rather handily - and I even had arrows taking wholly ballistic trajectories. Any more inaccurate and they would probably have come back out of the screen at me!
So, arrows are now more accurate and 'Missile' power restored - but so Armour & Shield have increased. Simply solving the 'problem' from the other end.
With luck, battles will be even 'better' than before.