Delete all fades is a very handy feature to have. Say you have one kind of fade across multiple edits and what to try a different one; equal power instead of equal gain, etc. or for whatever reason you need to delete all of the fades, this would be very handy.
Even deleting single fades would be very handy. You can do this in Pro Tools by simply clicking the fade, and only the fade gets highlighted, and you can delete just that. Very handy when editing if you get some glitches where double fades show up; just select one crossfade, hold shift and select the other--this highlights everything in between and you just hit delete. I know the range tool you can select it all, but just shift + clicking would be a nice feature.