Don't double post. If you have something new to contribute to the discussion and you still have the most recent post in the thread, use the edit button to add it to your earlier post -- even if it's a different topic.
On a different note, while talents on cooldown cannot be swapped, Primal Elementalist technically never goes on cooldown, it's only the FET/EET that do. This means you can spec PE, pop the FET during countdown and then respec EB and keep the pimped up elemental.
I've tested that it worked in LFR, and I tested on the dummy after, and I saw no reason not to conclude that I kept the full benefit of the talent, meaning abilities, damage boost and pet bar. The trick might be worth a few 100k damage.
(is this omitted from all three guides due to being a bit of an exploit? I can't be the first one to have stumbled over it)