Changehost needs adjusted. The teleport should be more limited or the perhaps, the battalion should just not allow a teleport at all.
Flamers could need something like a range reduction. Some kind of nerf to their shooting anyway. Or just a steep points hike.
The Destiny Dice interaction with battleshock needs to change. As it is, using any kind of destiny dice to substitute a roll for a battleshock test auto passes it. An exception should be made to allow modifiers to apply to destiny diced battleshocks. Or just disallow those dice to be used on battleshock.
Host Duplicitous is bullsh*t. Blanket prevent retreat is not okay. You get tagged by a horror unit, you're stuck with it forever unless you can chew through 50-150 wounds. And they probably cant fail battleshock either, because Destiny Dice.
They just aren't fun to play against with these tournament builds.