Is DCS supposed to be a simulator or an arcade? Every step to make even CA more realistic should be done imho.
There are a lot of people liking to simulate ground warfare and right now there are many stopgaps.
If ED isn't interested or has not the resources to develop it to the next level, outsourcing ground warfare to some dedicated 3rd parties would be a really interesting way to go, with proper SAM modelling, MBTs, vehicles and why not... infantry.
3rd parties may have the dedication and time ED might not having atm considering how many projects they have to support