Im going to pretend I understand the mechanics of what you guys are talking about, and simply make a comment/ brought up issue about the mod.
Mystcraft would be a great addition, but their is one issue, its OP-niis(i know that isn't a word) With only a sugar cane plantation and a chicken coop, someone can gain access to an infinite amount of already generated resources and building space, especially helpful for someone making large factories. Unless the mod maker has it toned down for SMP, do you really think it will not make the pack a little too easy?