I would vote for this being useful, while simultaneously recognizing the pretty extreme difficulty that I'd expect it to cause. Short of creating "our own" maps--and then maintaining them (double-yikes) it's hard to see how this could be done computationally from the base maps from the FAA.
I note that at my ridiculously crowded glider-towing + power training airfield, I use the flyway map (because I'm near enough to Bravo airspace that one exists). I find the white background creates far better contrast than the normal brown (yup, mountainous area) of the sectional or TAC charts.
Based on that, you could try using the IFR charts as a background. And I suppose from that, one might be able to do a computational color inversion of those; then you'd end up with mostly black backgrounds. You'd also lose much of the VFR information, of course...