Do you want them to replace Photoshop as well?  Texture painting inside Poser?  I think most folks will tell you that any program which tries to do it all, does a lot of nothing well.

Let's look at this another way... There are a million uses for Photoshop or for a 3D modeling tool that don't involve Poser. So those tools will be far more mature and full featured when developed for general use than anything it would be reasonable to expect the Poser team to give us. Poser shouldn't try to replace photo editors and modelers...

There are also loads of little programs and utilities that only exist because of Poser.  They exist because Poser can read/process data it cannot itself create.  Those are IMHO the kinds of things it does make perfect sense to include within Poser itself.