I'd drop Evocation and Thaumaturgy for Sponsored Magic. Using Seelie as a template you could have something like: -9: Druidic Magic: Harnesses the power of the elements and nature. Earth, Water, Air, Wildness. Can shapeshift into 3-5 different animals with 4 refresh worth of abilities.
Breakdown of how I got -9:
Started with Seelie: 5 "catagories", quick Biomancy, downgrades Winter Court Toughness: -4
Dropped one catagory, quick biomancy, and downgraded toughness for 2 refresh: -2
Added Modular abilities and 4 refresh worth of abilities: -8
Added a modified True Shapeshifting. Can only pick 3-5 different things and they have to be animals: -10
Added Human Form: -9
Still have four focus items for Sponsered Magic.
I'd like other input for the cost of this power, I think it works but it's difficult to cram shapeshifting and magic powers into one character. Or maybe he takes only parts and works his way up from there. Like start with a -6 power, but only gets one element, Wildness, 2 different animals, and 2 points worth of Modular abilities. This lets you still take stunts, or maybe Marked by Power, and you can increase your Druidic powers as you get more refresh. You may also want a version of The Sight that allows you to see elemental spirits. I really like this character idea, it sacrifices some raw power for tons of versatility and can fit in with any group as it can fill in many rolls (though not as well as someone dedicated to the role): tank, mage, stealthy investigator, tracker, etc.
On a side note you can't "replace" powers when you've changed, the closest you get is the +1 refresh from Human Form.