Well with the JTAC can lase for the Su/25t, Mirage2000 and A-10c (Haven't tested the A10a), you can launch without target aquisition from the aircraft. Its a very powerful feature when used correctly cause not all aircrafts have the amazing A10c tgp.
You would have to set the lase code manualy to 1113 on the JTAC to show the laser marker on the Aircraft HUD.
Since we cannot do that, red JTAC are restricted somehow to useless.
I'll do some testing on the JTAC today with the su-25t and see how it goes.