The issue with infantry skins is that those units are very small relative to the game. We had to do a lot of colour work to make sure that they're visible against the ground, so that you're not always losing your infantry units.
Yes, I appreciate that, there will always have to be a compromise between visibility and 'realism.' With respect, I think you might be underestimating the viability of infantry skins. There is precedent here... I give you Total War: Empires. Jesus, every Napoleonic war freak was buying infantry skins for their armies... there was just *stacks of it* selling. Just check out Steam.
People love this stuff. Do a skin representing the Grossdeutschland Division, late war flecktarn camo units, Guards, Russian AB, marine inf, really gnarly looking penals, make it so that *all* infantry units wear that skin and watch the drip-drip-drip of money.
I don't think a trial would hurt, although of course I don't underestimate the work involved versus risk.