Yeah, you need to shim the Spitfire minimum 1 degree. I shim mine 2 degrees with Unifoil and even then, it still has a bit of front foot heavy pressure.
Without the shimming, the board is, in my opinion, unrideable. There is just way too much front foot and like you said takeoffs will be pushing up against you a lot. But once you get the angles correct for your foil and stance its an amazing board. They dont describe this much in their website, so you have to figure this out on your own.