The biggest things I want right now are the following:

1. Default the Hierarchy window to everything being collapsed, as many have already said.

2. Render speed improvements. Daz3D is an order of magnitude faster than Poser. It's not a little faster or a lot faster, it is light years ahead in terms of speed. It is ten times faster or more, depending on the scene.

3. Fix things that just don't work well: face room, the fitting room (at least for me), and the morph tool. In general the morph tool works well, but it stops working properly with extreme deformations and especially if those extreme deformations are on an object using subdivision. The smooth tool in particular doesn't work properly at all on a subdivided object.

I can list others, but those are my three main ones. My main focus is on fixing the stuff that has almost never worked properly rather than adding new features at this point.