I like this draw. Neither Djokovic nor Nadal are guaranteed locks for the finals which should make for an interesting tournament. If Wawrinka is ever going to beat Novak again, the odds are it's likely to happen in a best of 3 match given how much Stan invested in AO and USO and still came up short in the end with the pattern in both matches being very similar - Stan with all guns blazing from the get-go and very close to be 2-0 up in sets on both occasions only to be denied by Nole who steadily crawls his way back into the match and eventually wears him down till the bitter end. So this time it's actually a good opportunity for Stan to finally get that win over him. At least in theory.
As for Nadal, his matches with Kohlschreiber are always highly competitive and entertaining. I'm also curious about a potential QF with Haas. Tommy on his day can be a tough nut to crack on Indoors. That said, Hewitt-Haas should be an intriguing battle of veterans and I'm looking forward to it. One simply doesn't know how much longer we are going to get to see them. In case Nadal makes it, for the sake of an interesting semi, I hope it's Isner. I enjoy watching Berdych Indoors when his game is in full flow but he's just hopeless against Nadal who can exploit and punish his weaknesses like no other. All things considererd, it's a great field with nice storylines for a 500 event.