It really isn’t.
First, the change from the latest PTR build is as follows:
Sacred Duty now also procs from Avenger’s Shield. Now lasts 10 sec, down from 15 sec.
On its face, it looks like an awesome change. Avenger’s Shield is sorta a holy power generator now, Grand Crusader becomes a much more useful talent, we get more Holy Power–all together, a great package deal!
So Theck runs the numbers over at Maintankadin and from his various simulations it seems like going from a priority of ShoR>CS>J>AS (our current priority system) to ShoR>CS>AS>J is worth an additional 119 dps at 2% hit/10 expertise, after this change. Basically, that means prioritizing AS over J.
Likewise, moving to a priority where you use AS from a Grand Crusader proc to generate an HP before using CS is worth 160 more dps than ShoR>CS>J>AS. (With 8% hit and 26 expertise, though, putting CS before AS comes ahead, again.)
If you haven’t noticed yet, we’re talking about ludicrously small numbers here. Blizzard obviously intended this change to make Grand Crusader much more attractive as a talent, to needle the legions of tankadins who have forsaken what was assumed to be a great talent by the designers (hell, they designed an official power aura for it). And the best they can do is add another 160 dps to the rotation–a rotation that sims for 14406 dps (using that latter priority system example)–when we use the abilities and talents they cajole us into using.
The root of all evil, of course, is that our rotation is so stupidly simplistic and rigid that we’re really only ever talking about changing what goes in that filler spot. Rather than rant more on the subject though, I’d like to point you to Theck’s comments on the matter. He says it much better than I could.
RIP Block Rating
One last build 13793 change that’ll affect us is Enchant Shield – Blocking is being changed from giving 40 block rating to 50 mastery rating. The enchant is currently worth .45% block chance, while 50 mastery rating is worth .63% block chance. So the change is a minor buff of .18% block chance.
More importantly, this marks the last vestige of block rating being removed from the game. Much like Tarkin announcing that the last remnants of the Old Republic being swept away, so too this shall pass. Farewell, old friend.

