Considering that Evans just beat 2 top players in Tomic and Nishikori it would be very strange not to pick him over Ward. Has Ward beaten any top 50 players this year?
Ward did beat Tursunov (now ranked 32, though not as high then I think) at the DC tie in April. He had match points v Dodig at Queens in a 3 tie-break match. And I think he's played more on clay than Dan. I was only questioning though, because people seemed to be assuming Dan will play.
Colin & Jonny have been doing well, but Colin had his best result ever when he played with Andy in August, and reached the finals in Montreal. If Marray is injured that's obviously another thing to consider. Dodig of course is part of a top doubles team, though won't be with his usual partner, Melo.
So plenty for Leon to think about - but he's brilliant, so I'm very happy to trust his judgement. Good luck to them. Wish I was there! Anybody from MW going? There seem to be quite a few fans going from what I've seen on twitter etc.