More ranged units

I have only been playing this game for 3 years and it just dawned on me that AT, Tanks, AA, etc must all fight hand-to-hand rather than from a distance.

Have the mods ever looked and attempting to make these units ranged? If so why wasn't it implemented? The game was too hard to balance?

From my viewpoint I could see where all inf types (maybe AC) were all hand to hand while there were so range given to these other units...not nearly as much as arty. So you would have your inf in front and right behind your tanks and behind that your arty.

Just a thought. Maybe too complicated.