CR2 exports all of the morphs, and I mean ALL.  If you gave a gazillion Genesis 9 figures and morph packages, the PMD file is huge, which is proibably what causes the lag. FBX doesn't seem to carry the morphs over.

I'm also assuming you had to import eyes, brows, lashes, etc separately as conforming objects. 

But then comes the challenge. Try posing and see what happens.