being a light vehicle counter is one of the most niche job ever. The ostheer are facing down stuarts and t70 on a regular basis and their t2 arsenal just doesn't cut it.
Pak, fausts, shreks or mines (realistically some combination, you won't have the muni for all of it) are a fine soft-counter for t70/stuart. It doesn't make sense for ostheer t2 to be able to hard-counter allied light tanks. Building light tanks is a gamble because they have a fairly narrow window of opportunity and don't have much use in the late-game (stuart especially, t70 recon mode has some good utility). If you give ostheer the ability to shut down allied light tanks as soon as they hit the field that will just push light vehicles back into irrelevance.