I was just thinking that the two radars might be improved with a small tweak.

Make the front radar a concave hemisphere, and the back a convex hemisphere (a very light grid over them would help). Past that nothing really changes, but it could give players a better idea or help them place an object faster in space.

On top of that, it also makes it very obvious which way the radar is pointing.

Again, nothing really major, but I think it could be nice.

hmm, not a bad idea, and i think the only real graphical change needed should be the addition of the grid, since the radar allreay has concentric circles to identify how far around from your facing targets are.
possibly have it able to be turned on/off?

Yup, I was guessing it already mostly mapped things to a "hemisphere" anyway given the way targets move across it.

And ya, ability to turn the grid off/on would be cool, or even set the level of transparency so you can make it as subtle or glaring as you like.

how about marking fellow guild members out in orange on the scope?
Would help out in guild operations.

one way to give the radars a "hemisphere" appearance would be to add some slight spherical shading to them.