That's the way it was. Do you want fantasy 20mm turrets on German tanks and halftracks or what?
The problem is not the fantasy turrets or the like, im here totaly in line with you no one needs fantasy crap, but the vehicles the Germans had organic in their units are ingame spread over different sections while irl they would be part of the unit, this reduces the amount of German half tracks with more powerfull weapons overall.
The Panzer Lehr had as first Pz Div the so called freie Gliederung and as you can see in the following link with 23 Half tracks of the Pz Gren company you have:
2x Radio HTs, 10x "generic" HTs with 2 MGs, 7x 20mm HTs, 2x Mortar HTs and 2x 75mm HTs.
argl cant lead you to the right unit via link,
http://www.wwiidaybyday.com/
go on Kriegsstärkenachweise,
go to Panzertruppen
and then on the left side of the table under KStN nummer to: 1114c (gp) (fG) of the
(1.7.1944)
sorry for the inconvinience!
So almost every third HT is a 20mm HT, i personaly had hoped for a CM like approach to buy historical correct units in platoon/half platoon size ingame but oh well.