My biggest gripe with P8 is the difficulty with navigating the folders. I started out trying to use the drop-down tree menu but that was impossible for several reasons:

1. It only shows as many items as will fit in the "library" area, so long lists are cut off with no way to scroll down. Thus the "V4" folder in the screenshot above can't be accessed.

2. Lists of subfolders often appear BEHIND their folders (also shown in the screenshot), so you can't read them and drill down to the subfolder you want.

3. If you change your mind or move your mouse over the wrong thing, you can't easily back out.

I much prefer P7's arrangement with the library and parameters next to each other. When I undock P8's parameters so my library can run the full length of my screen, I'm in danger of accidentally redocking it in weird places (like across the top) whenever I need to move it slightly. 

When not using the library tree in P8, you have to click on that teeny tiny arrow on the left to open a folder. That requires far too much precision. Clicking on the name itself only opens up the folder some of the time - usually not.

Once inside the folder and viewing the icons, cursor-down only works some of the time to scroll down through the icons. Every few icons it will get stuck and I have to mouse-click on an icon to get it going again. 

Accidentally clicking the refresh button twice in a row (or twice at all) causes Poser to instantly crash - yet the refresh button doesn't always work, which means some folders are permanently inaccessible without restarting (and sometimes even then). Poser 7's instant updating of folders was much better.

However, the folder icons on every P7 top-level folder within each library were meaningless and created a huge amount of wasted space - this was never fixed.