If you're talking about putting snipers into them, it's nothing new, nor some sort of ultra secret.
Most people don't do it because it involves team co-ordination, a lot of resources and T0 anti-tank is available for OKW. The glory days of the M3 being faster, tougher, and also having snipers in all from the T1 building aren't up for a resurgence any time soon.
This pleases me.