I guess I prefer more highly visible, contrasting with the sky, colors. I have an L-39 in "arctic camo"...neat looking scheme, on the ground. But on blue sky days with cumulus clouds it can get tough to see at times...I suppose just like the inventers of the camo scheme intended
You do make a good point though: a new scheme for V3 models would be a good way to differentiate it from previous versions. Not a bad idea at all.