The wallpaper section of this site is heavily moderated. This is due to the sheer number of wallpapers submitted, and if they were all allowed in, it would become quite hard to navigate the mountains of wallpapers for the occasional gem.
It is my feeling that lately the DesktopX section is undergoing the same problem. There seems to be an endless stream of complete themes, massively outnumbering the objects. It is my opinion that most DX themes aren't particularly useful without a huge amount of work. This is due to the fact that most people don't have the same software installed, of which the programs deserving of desktop icon real estate will be even more largely varied, on top of this, people run on a huge range of resolutions, and many DX themes don't have resolution independance. What this effectively means is that for people to go through the DesktopX section and find something useful, takes a very long time due to the huge amount of filler (Well in excess of a thounsand submissions to this section, and constantly rising). I know that there is already subcategorization of this section, but it's rapidly becoming less and less sufficient. It is my feeling that this section would benefit from the same strict moderation that goes on in the wallpapers section.
Just my thoughts.