Nah, I think GSC fits both the game and lore better. Ordo Hereticus is great for GSC, but nobody is going to be mystified about Orks or unravelling secret plots.
I don’t pay any mind to the narrative beyond “those enemies need killing” lol.
Orks would be amazing fun to fight in DT and the dark humour would fit perfectly.
Ork infested space hulk crashes into the planet. Narrative done 
I want expeditions to be like chaos wastes with near game changing perks you can buy with salvage or you can get from sites! 0=
1.Balance, lets be honest even if current changes are good its still long way to put it in good spot.
2.New missions, biomes, maps and story.
3.New weapons both universal and class uniqe.
4.No more new modes but actually make current one fun to play.