Stock Fox springs are really soft. However, like any coil spring, cutting it will up the rates a bit -- but probably not as much as you desire. FWIW, one of my Foxes had 1.5 coils cut off all around. Lowered it just a bit and firmed things up noticeably.
Another option might be some aftermarket 35mm lowering springs for a MK2, which will up the rate but not lower the lighter/different Fox much, if at all.