Hmm, I think you're mixing a few things up ?

If you export from Poser the correct way, the object file will be the exact same as the one you can find in the geometry folder.

Only if you chose "weld" from the export dialog the vertex order will be changed.
Of course an unwelded object will split when you try to smooth it in ZBrush or similar, but that's not Poser's fault.

The problem is that Studio and Poser rigging needs a grouped/split object to work, while other rigging systems work with an un-split object file.

So the actual "problem" is the Poser/Studio rigging.

But with MLP and the Morphbrush that "problem" is really not a problem anymore.

The only other solution would be to introduce weightmapping as a new rigging system, but this would:

a) Break compatibility with ABSOLUTELY EVERYTHING already out there
b) Cost lots of $$$ and time to implement
c) Would be no actual improvement anyway now that we finally have full control over how a mesh bends in both Poser and Studio.

So, hmm, I honestly don't see where the problem is ?

You want better joints in Poser or Studio ?
Two years ago that was a BIG problem.

But now you can have any joints you want.

:-)