The problem with things like numbers or even the current squad artwork is it's pretty much invisible at the ranges we usually fight at in AH. Sure it looks cool in screenshots, but in day-to-day flying it may as well not even exist.
In order to be visible at the ranges typically used in AH, something the size of an entire airplane texture is practically required.
I think it'd be a great feature to allow each player a SINGLE personal texture for ONE plane at a time--this would prevent everyone from having 30 different textures per player to download. If necessary due to download constraints, such textures could be made smaller in size than the "default" airplane textures (in other words use lower res textures for the individual artwork)--at combat ranges, such a lower rexture resolution wouldn't look much different anyhow and it'd do much to save on upload/download times. It's been done in other games (maybe not in a flightsim, but it HAS been done), so the tech is there.
Some sort of system could be invented to prevent players from manipulating the artwork of others.
Sure some players would doubtlessly prefer things like, say, bright red airplanes. My thought is that such should be disabled in the "ToD" arena, but is NOT out of place in the free-for-all MA (Classic).
J_A_B