I personally feel fast Panzer II is much more of a problem for brits. It really forces you to go for an AEC, if you haven't it when the Panzer II shows up you are pretty fucked. One 6pdr as the most expensive AT-Gun is easily circled while british infantry do not have a non-doctrinal snare and you will never hit a fast moving luchs with piats unless your opponent fails with vehicle movement.
Why are you complaining about counters when the AEC is the counter yet you refuse to use?
Btw using the luchs is extremely risky. the t-70 stuart and aec makes short work of it . Even if it doesnt get killed you have an unit that creates no impact and you are still stuck with vg's. Its better to tech straight to the flak truck building and pump out obers and a p4. which gives the okw a much better midgame.