this is only my opinion
0.ad needs
1- Readiness for steam / or similar platforms
Game is still considered as Alpha , so it means there are still many things in the game that require change/add/improvment , once they (0AD team ) reach to the point that ok now we can consider game stage as Beta then they can consider it for Steam.
2- Discord official server
This is something i believe would help, but for some reasons not happend yet , maybe same reasons as steam ? but i personally perfer to communite on discord platform
it can create a load on Project team, but here community can help and join as moderator to support and manage discord community
3- More support from community
This is a community driven project , they are not hired ( if i am not wrong ) so it means whatever they do on this project is based on Love and they need to sacrifice their personal time to do anything on this project ...
here maybe if the project team where they need help ask very specific and post it then get help faster to close it.