Quote - 1. A useful 3D modeler, preferably similar to the one in Lightwave 3D (independent but with link to Poser)

2. A faster (and better) rendering.

3. Ability to save the renderbuffer to Photoshop layers.

You have Lightwave 3D, correct?  I use Wings3D primarily.  There are probably a dozen other modelers people use.  Not only would developing a modeler from scratch cut heavily into the resources available for improving Poser's core functionality, there's a high chance most users would continue using their current modeler of choice (What if it were powerful but unintuitive?  What if it were intuitive but only provided the most basic of tools?)

My question (I personally think adding a modeler to Poser would be a huge waste of development resources and would likely result in a bigger/slower/buggier program) is what would be gained by having a modeler included with Poser, aside from eliminating the need to import/export?  It sounds as if you would be happy having that modeler be a separate program, so how would this be better than using one of the many tools already available?