I'm loving the two new feats for druids, but I do have my doubts:
Elemental Essence
1d6 extra damage + resistance? Sweet! But that duration, though...You'd need to be level 10 to get even a tenth the duration of your average varnish. And druids only get 5 uses of wildshape, with no way of increasing it. Maybe up the duration to turns/level? Giving more uses of wild shapes ( through feat or otherwhise) might work as well.
I'm curious though, will you be able to apply this while in animal shape?
Primeval Shape
THIS. ALL OF THIS. I love shapeshifting to fight, and this'll give an edge, for sure. Though, even with the extra strength, it won't do too much. Wild shape animal forms (even the dire ones) do mediocre damage and piercing at that.
Maybe add a cold damage buff as well? If the elemental essence stacks with it, then it'll certainly turn you into an elemental beast! Pun fully intended.
Also, yes, more shapes and/or pets choices would be awesome.
At any rate, keep up the good work, developers. Loving all the effort that goes into all this.