Renny is playable I was out there Sunday.
It's still confusing as all heck, because they changed several tees, yet nobody though that updating or removing the OLD signs was a good idea. So - the tree signs and arrows all point to the old course, the numbers are off for much of the course and it's pretty confusing if you haven't played there before.
I'd recommend Nevin, RL Smith, or Bradford if you are in the area and looking for a great, well marked and maintained course to play. Renny won't be "finished" with the new layout for a little while longer, from what I understand. Like I said - playable, but I wouldn't go out there without a local to guide you.