OKW tiers and units are pretty FUBAR right now. Who would ever want a Luchs so late in the game when you are desperately trying to save fuel for panthers / tigers to fight enemy armor?
If they put that in the first or second buildings it might actually get used before getting blobbed to death by bazookas.
It exist so if you skip t3, you have a light vehicle to field.
It's a pretty good tank.