For what it's worth, Restoration Affinity with the 50% bear penalty may not be hugely impactful, but it double dips into Mastery. With the 2pcT18 bonus, it's not uncommon that I get a 27k healing tick from Ysera's Gift (when including the Nature's Guardian portion). In my current gear, with Mastery procs, Ysera's Gift ticks for 3.5% of pre-Mastery health.
It may still be fairly weak, but I'll take that over a 15% movement speed boost or an extremely situational range boost for picking up adds in a world where we're expected not to sit at 100% most of the time. If I'm having trouble picking up adds, and that 5 yards is really going to make a huge difference, I'll switch to Balance Affinity for that fight.
Regarding FR: I was still stuck in the mindset of using it as a maintenance heal even knowing full well that, post-patch, it's not up to the task. But one of the first things I did to test my fuzzy tank out on patch day was jump into a Kazzak PuG. Second Fel Breath ... keep Iron Fur up to trigger the set bonus, Mark of Ursol to mitigate the breath itself, and FR immediately after it hit ... most of the outside healing was overheal at that point. You can also always keep one charge on cooldown when you're not tanking a boss that uses more than one big hit in a row.