For some reason I feel I should ask this: Below the 3K mark (or wherever the next haste breakpoint is after 2005) should as much as haste as possible be moved into mastery? ie is "Mastery > Haste after 2005" still a correct dynamic in 4.3 until the next breakpoint becomes reachable?
Yup, that's true. You can see on theincbear.com 's Google Doc list of Haste Breakpoints : http://goo.gl/wc19m that for Resto without Warlocks in the raid to give them Dark Intent, 2005 is still best.
If you *do* have the Warlock, its up to you whether you drop to 1573 Haste, and maintain the WG/Effloresence ticks grabbed by Druids without
Dark Intent, and pick up 433 Mastery, or still push for 2005, and be safe when your Warlock can't make a raid, or in 5 mans.
Personally I picked up that bonus Mastery since our Warlock very consistently shows for our raids.
With regards to your question about WG, I read the same, that the more frequent cast time makes up for the drop in affected player count and makes non-glyphed WG better throughput.