So a lot of the old school Diablo single black tech trails have been smoothed out and turned into Blues. However, some of them are still quite challenging, so you need to be careful. For example, Bushwack has been made much easier and recently turned into a Blue. The Jack has been made easier as well , and is now a Blue. However, that can be a challenging trail if hit at speed. Then of course, there are the Blue flow trails, such as Domboo, Breakout, and Indy, which are probably what most other parks consider what a Blue trail is.
Yes, they are working on Stigmata. You can see the end on your right while you are on Greenhorn, right before the wooden bridge. That slab looks completely insane.
My first day ever at Creek, I ended up on BMW/US Open/Stigmata, I was having trouble even walking down those trails. I thought I was going to die......