Even though we have a house full of beautiful hand-made quilts my mother made, we have had to take all heavy covers off the bed and replace them with a light-weight down comforter. That has been very helpful for me so far in dealing with feet that can not stand the pressure of heavy covers. While I don't suffer foot drop or severe contraction of my foot and leg muscles, it is bad enough to wonder what my next step is . . . because I am up and down all night due to Crohn's, and the hobbling is getting worse.
I hope you find a lightweight and cool solution . . . 'cuz I am right behind you looking for solutions.