Well here is some changes I think could help the game, they are not crazy one as new animation, the new armor types or SYNC kills but I developed to change the meta as most as we can and create new strategies, for this post I was a main ork army but is so difficult seen eldar so I did a full transition to the eldar, sorry for my English because my native language is Spanish so I hope we can talk about this and devs could get some feedback from the community
Re-Cost the army upgrades from infantry and vehicles with both power and requisitions (I think the current system with only power from infantry and only requisitions affect severely the game, invest in infantry upgrades is too expensive in early game also delays your tech so much and when you get vehicles the requisitions income is too high that is almost disposal so trying to balance those costs to make infantry upgrade more reliable and the vehicles more expensive)
Buildings longer can be stunt (this is especially bad for eldar player when you can stop the building teleport)
Create observer players: In DOW II one of the easiest ways to understand the game ones the game has so much life and player base is to high skill was join matches and be observe and learn
In replays create a new HUD like the DOW II where you can see name of the player, elites, doctrines and resources…. Maybe a folding menu where you can find the units but I think only the important.