With the unavailability of a number of Sichuan sites, maybe not the best year to visit? Or will waiting only be worse?! As Sid says, there seems to be plenty of habitat, but access is the real issue. The challenge for visiting birders like myself is that there are always time pressures, and this militates against finding new places, while those "facilitating tours" (or whatever the euphemism is currently to avoid the "tour guide" label!) are obviously busy doing just that... Hoping things work out, Craig!
It's an interesting question, Jon. In China, you really never know which sites will close and for how long (Wuyishan, Giant Panda watching at Foping, Changqing, Wawu Shan, even Wolong has been tricky to enter at times), so you have to gen up well and be ready with alternative sites.
No year for several years now has appeared to be the best year to visit - we've run an annual tour every year since 2005 (bar the tragic earthquake year) and not once have we been able to run the same itinerary the following year due to a variety of reasons that has meant certain sites have closed. However, this has led to a number of 'new' sites, or older sites becoming reused so the actual number of specialities possible on a time-restricted, say 3-week, trip has remained pretty much the same (gain a couple, lose a couple each year).
If Wawu Shan, and then Labahe had remained open, would any birders have visited Longcanggou for example, which is a great spot - if that closes, which is likely, then what? I'm sure another site will be visited instead, with equally good birding opportunities (or Dafanding might return to a birders itinerary). With Wawu and Labahe scheduled for reopening next year in theory 2015 should be great - but what if the habitat along the roads and trails has been altered to an extent that it will require 3-4 years of regeneration before they return to their former glories.
A site with just about everything, Emei Shan could be visited for a longer period of time (still ranks as one of favourite all-time birding destinations - I still don't get why so few birders go there any more).
Regarding the habitat - Much of it is accessible, and access has only been restricted to a certain number of familiar sites, just needs more birders to try something new and be more adventurous. I remember on my first visit to Sichuan, over 10 years ago now, and we didn't have a clue where to look for Chinese Monals, so we scouted many, many hillsides (getting chased by park officials up a slope at Jiuzhaigou during our 10 days there, way above Long Lake lingers long in the memory!) - and then we finally found the several at a site that birders still see them at now, at km91 at Balang Shan (as we stayed with the yak-herders just below the pass - a horrid though unforgettable experience) - I find it amazing that even now other sites for this species are not on standard itineraries (as we found them at other sites too) - Wood Snipe too - I bet they are much more widespread!
James