I speak for the entire Poser team when I say that we value your feedback, and truly appreciate your support. 

Hi Steve,

Thanks for your interest. There are many new features that I would love to see in Poser one day, like level of detail, larger render areas, built-in sky domes and infinite planes, but if I am honest then I have to admit that you would get the biggest bang for the buck by consolidating existing features and improving usability.The bullet physics integration for example seems hardly leveraged.

• Poser figures should use soft body dynamics.
• There should be collision detection between figures and objects. Placing a hand resting on a table should be a matter of placing it there. With collision detection ticked it should refuse to move inside the table. The finger joints should flex as you apply more force it to it.
• Same about collision detection between a figure and itself. This might stop thighs and shins intersecting in kneeling poses without having to resort to correction morphs.
• A "posed" button on figures would keep the pose frozen (like it works now). Unticking it would turn on ragdoll physics. This could also do physics simulations of chains and other jointed physical objects.
• I would like to see the cloth room be made redundant. A tick to turn turn on cloth simulation on a clothing figure would be nice. No more poke-through ever.
• I'd like to simplify your library categories. Hands and faces could just be a special type of pose. I think having lights as objects would make a lot of things simpler to manage.

On the UI I can see your problem. This was a great UI in the P4 days but updating it will inevitably incur the wrath of existing users. An easy improvement that doesn't break backwards compatibility would be to have every function assignable to a custom hot-key (like Silo).

The injection morph system is tedious. Can we not have a folder where we just drop in the morphs for a figure that makes them immediately accessible to all instances of that figure? (With buttons on the figure instances to combine morphs and to delete 0 morphs to save memory.)

I'll stop here before the post gets to long to read. These are just some of my personal preferences and I make no claim of representing any section of your user base.