Holy crap, that's the trail I remember! When I first went out to QR a few years ago I walked up this rough, leaf covered trail that had lots of cool concrete blocks and a couple small berms. Then I actually got a decent MTB and started learning the QR trails but never saw that trail again. This is totally it!
Anyway, I rode the new trail today. It's a really cool trail and I think it would be even more fun if we smooth out the second half in a few spots. Would that be OK if I worked on some of those ~4" or so bump/ruts to smooth them down and make the trail smoother/faster? I think this could be one of my favorite trails once it gets ridden in more and I learn to ride it better/faster. Maybe room for a medium sized tabletop in that open, straighter area near the beginning of the trail? Or do you want to keep this one more natural-ish?