The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
I also to be clear it isn't that the mod client doesn't know about the options it is that the server doesn't in w how to create map names given a set of options that the client can use to generate a map.
To support this effectively the entire client server communication with regards to generated maps in the matchmaker has to change.