Thanks for showing this
The low-lat stuff sounds great, but I don't think fastest would be fastest without stacking 
Gameplay fixes
Permanently stacked workers. Fixed an exploit that allowed workers to stay stacked (non-colliding) even while attacking, performed by queueing move orders on an unoccupied vespene geyser
Yea I agree, but I am sure if you talk to them and the majority of players would switch over, then they would agree to build a toggleable option for that or disable that feature in fastest queue. Its just that worker stacking is not allowed in any other game mode of Starcraft (and rightfully so), but in Fastest its part of the gamemode imo.
I am sure there would be a solution to this possible somehow