The Dust Team is multi faceted what one team does the other team is not an expert on. So those responsible for physics controls and balance are not responsible for orchestrating the server being able to orchestrate an orbital artillery strike to smack a pesky destroyer out of the sky, is not responsible for allowing players to trade with each other, is not responsible on how the new suits look like.

Core will continue to be refined, making a good FPS at the core with all colors, models, and sounds removed is still something most people cannot do overnight and takes too much trial and error and some games which had gotten it right seem to have lost their way such as ID software.

Some studios had spent 12 years trying so and still failing.

There is more in 1.2 than just those mods that some players are going to like very much.