Well this is second hand gossip. Several ppl in my WoW guild, who play a rather wide variety of games have given some pretty negative views of the Matrix. Several played in beta.
Alot of it seems to be on odd design choices, ie classes that are simple translations of fantasy types: fighter ,healer, pet classes, etc that seem weird in the Matrix Universe. Also a pretty clunky interface and drab environment-although this is pretty consistent with the movies.
I also wish WOW would get with t e new content, but of the dozen or so ppl Ive spoken to regarding the Matrix, almost all have been negative in some way.