Their are two things i really would like:

1 a much better interface:

an improved library:

• folders separated, as explorer (or DAZ|Studio)
• no more different folders for different type of files. I would like everything in the same folders and subfolders (for example, for a cloth: the figure in a folder and the subfolders containing MAT pose and Morph pose.) Then, you could have simple filters to show only one type of file.
• a database/bank library. When you select a figure, the library show only the files that are for this figure.

a better way to select the figure and props, a better hierarchy tree (and faster).

a layer system, so you could hide multiple figures without losting the visible features of different parts.

1 a better render engine (raytrace):

The only thing i'm asking is to remove the "scale" artefact (black spots when using refract or AO)

I have lots of little idea about the interface, but a lot are "the way i work" and would not be good for other users. I would also hope there will be only one version of Poser, at a single price.