Rosencrantz said:
Trouble is on a battlefield you don't want to be the guy in the 12 ft tall suit, theres a reason tank designs have been getting shorter and shorter, last thing you want to do is stand out.
Unless you're so tough and/or powerful it doesn't matter if anyone can see you or not. That's an angle weapons design and warfare has been neglecting recently - it's all been about camouflage and stealth. There's something to be said for intimidation, overwhelming force and just smashing the hell out of everything. 12 feet? The life-size Gundam replica is
18 metres high! It could probably just pick tanks up and lob them at the horizon.