Im hoping, since the D-series will get more updates, that we will get the "dirty" skin back again. It was removed a few updates ago. Would be fitting to have it back with the new d-series stufff =)
The devs said it was deprecated, so it probably won't be coming back very soon, unless there's an updated version of it.
You do know the new documentation thing is still being worked on right? Its in its beginning stage. The current wiki is a bit dated and in a older format. Its not that easy to navigate and it is lacking a straight forward-nes to it. The age limit to be on the forums is 13 not 6