I don't think there is a list. There is an overview here https://forums.elementalgame.com/374531
But i don't think there is a feature list yet. Which makes sence. The game is still in beta and a lot of stuff is still changing.
There is also the beta status thread here https://forums.elementalgame.com/363845
It sorta gives you a clue, but the devs really only flesh thier plans out when they get there.
This is also partly why they have real betas. Not says-beta-but-is-actually-demo betas. So they can figure out what stuff should be in and what to toss. Its why stardock is so cool. You can actually see the devs reacting to player input.