I agree with Karl, that the Germans need something like the Sd.Kfz 222 or Sd.Kfz 223. It's been suggested by a number of different people on different threads
I believe that about 1,700 in the series (221 / 222 / 223) were produced until production was stopped in early 1944. And yes, they were effective machines. So much so, according to Wikipedia, "One captured Sd Kfz 222 was transferred to GAZ for examination and analysis on September 7, 1941. The first prototype was tested on January 9, 1942". The amour design is so similar and the Russian design post-dates the 221 by about 6 years.
The Germans need the SdKfz 222 / 223 to bring some balance back to the game. Or the BA-64 needs to be removed. I'd rather have both vehicles, seeing as the Russians tanks still have a big speed advantage over the Germans.
As for whether or not these recce vehicles should have have the ability to call in arty is another matter. At least the 223 did have the powerful radios and aerial array to actually do the job.