3.) Lack of lightweight accurate target location designation systems to support dismounted Soldiers in the IBCT
1) A compass, binos, a protractor, and a map are not that heavy.
2) The VECTOR system is fielded, works pretty well, and is not that heavy.

Look at your target location training, and fix it. Then look at your PT program, and fix that. If both of those are good and you're still having problems, then look at a new system.