So what exactly is the question?
Fact: FA does not stack with GotW (paw). If you run with a druid, you get no benefit from this talent. FA is a waste of 2 talent points.
Accimilation: Very situational and I would only ever get use out of it on certain fights. The points would be better spent on threat talents unless your stuck on a fight that would use it.
Your spec is missing key talents of Chill of the Grave and Rime while taking KM. maybe with the changes to it might make it worth it to tanks, but im still out on that. CotG = more RP = more FS or RS. Rime is just an awesome talent too.
I cast the spells that make the people fall over.