Having watched a few runs it's clear to me that a few mechanics aren't being used to their full potential. Wall bouncing is almost never seen and it allows for input buffering which would help some areas of the map where run/jumps are commonplace. Also considering the weapons are coded so that the shots leave the chamber, implementing wall bounces and running with point blank barrel headshots with either sniper or shotgun would save a considerable amount of time in places where enemies are clumped together, act 4 comes to mind especially. Do many people still run this game?