For the reasons given, 'integration' with Blender isn't possible. However Blender is moving to implement USD for file transfers (USD being universal scene description). It's a Pixar system that would allow working between different software in a common workflow. Essentially, if Poser also got USD you could import whole scenes into Blender or just about anything else that uses it. From what I have seen, the issue so far has been poor maintenance of the file transfer formats (like FBX) so that things don't move nicely. Hopefully USD might come a step closer to a common transfer platform.