I rode it yesterday for the first time in a few years and it was rather discouraging, especially since that's where I first learned to ride. I might try to put a map together of the current trails and the ones now gone, for whatever reason. But I would say more than half the trails or either rendered useless because of huge obstructions or just stopped being maintained or travel. But you can't get any kind of real flow in there and even if you do your chasing doing small loops to get there.
Sad, because at it's prime CQ was a pretty technical trail, it was short but sweet and tough, you'll never ride on more roots in some areas. But it was the prefect trail if you wanted to just a get a quick ride in.