I suppose some people's thoughts about this can be looked at as a crying out of, "Stop playing there, play here instead," even though it is, to the best of my knowledge, fully within the rights of the hosts of the X, A, and M servers to do as they wish with their server. Still, it's looking quite true that these servers do less for the community when a new player goes into them than if the said new player had started by going into a non-modded server.
I myself have played from time to time at these servers, popping in once in a while. Usually, if I'm going to play at them, I do go to X. There, I find that having the high experience and skill that I do with 1.1 settings allows me, and definitely anyone else of even a few notches down in skill, to take almost full control of the flow of gameplay. Being able to take a marauder and annihilate almost a whole base full of 10 battlesuits can be fun, but the entertainment doesn't last for me.
Unless the hosts of these servers realize exactly HOW their servers affect the community, as compared to how much more inviting a start at a 1.1 server is, there really isn't any current "right" solution to this "problem."