I have gone to a variety of different poses, including partial poses, and have not found any particular problems.

I'll back up whoah on this.

Most of my poses take a big hit when using the new V4wm offered by Phantom3D. Mostly hands and feet. I don't care personally. I plan to just correct them and resave as I go. My V4s are heavily modified in Zbrush so I expected as much.

The switchover is just plain worth it.