I don't want to ruin your happy illusion but when TWW3 comes out there will be greater daemons and other certain units on factions so let's pick the example of Bloodthirster, how is he gonna fly since he mostly walks as a unit in TT? You need to completely change the fly mode. Flying units should hover instead. Salsicha already asked for it and all agreed it was correct. It's ok it's not implemented yet but for TWW3, which is a new game, it has to happen. All flying units should be on ground and get a hover ability, even bats. In the previous 2 TWW games it wasn't that much of necessity but for TWW3 it is a must fix. Dawn of War 1 had a good hover system, check assault marines etc.
P. S. Actually we need a fly option and a second stamina only for flying, which will recharge slowly and only will affect flying, the regular stamina will not be related to flying.