Technically, PS is still a demo, and I am afraid it will be for at least a couple of years more (think: we are at version 0.3.xx and the 0.1.xx was Atomic Blue, 0.2.xx Molecular Blue and 0.3.xx is Crystal Blue and they have been released in 4-5 years!!!).
There are plenty of bugs to be fixed, maps to be created, races to be done, implementation that needs to be made as well.
If you are impatient of seeing a more defined product, you can learn programming, or modelling, or doing textures and you should try to join the team to help us!