MXP was listed by some as a "first rip out" thing. So in following some advice that was given, I've decided to poll for whether or not you think AFKMud should continue to support it with 2.0 and beyond.
I'll start off by saying that I am displeased with the lack of progress with MXP and the lack of proper standardization of it. It's become a lot like the web browser problem. Pages that render ok in IE fail in everything else, and pages which conform to the standards will sometimes fail in IE. I see the same set of circumstances having occurred with MXP. Zmud produces one set of results, while everyone else who follows the published standard ends up with something a bit different.
What this means for codebases and mud admins is that MXP support cannot be guaranteed to work properly in Zmud if you follow the published standards. If you code your MXP to work in Zmud, you often end up excluding people who use other clients such as MushClient, SimpleMU, or Kmuddy. Numerous patches have been produced which give favorable results only in some conditions.
Long story short, personally I feel it isn't worth being caught in yet another "lets disobey our own standard" problem. It hasn't gotten any better over the years.