I don´t have all of the german squads so I don´t know the extend of this but the first Engineer and MG squad now wear a helmet with a helmet cover with an SS camo despite neither of them being Waffen SS. Wearing parts of the uniform of a different branch isn´t exactly a common occurence to my knowledge. I also don´t recognize the helmet cover itself as either Wehrmacht or SS personally. Meanwhile the actual Waffen SS squads remain unchanged with their Heer uniforms. Wich brings me to the question of why even bother?
The German 5th Infantry Division was formed in October 1934 and mobilized on 25 August 1939.
In 1943, Adolf Hitler declared that all infantry divisions were now Grenadier Divisions except for his elite Jäger and Mountain Jäger divisions. So it´s a regular Heer unit and not Waffen SS.
The 9th Division was formed in December 1944 under the command of General Bruno Bräuer with many Luftwaffe personnel transferred to combat duties for which they had no experience; it was thus a parachute division in name only, paratrooper training having ceased in mid-1944.By that time the new “paratrooper” units were ordinary infantry units under Air Force command.
In this case they should even have Luftwaffe uniforms instead of Heer uniforms.
Is this an important issue? A litte bit, “REALISM The game gives a feeling of participating in a real military battle, re-creates the atmosphere of the Second World War and is careful with details.” From the official website. I have no doubt they´ll change it someday just thought someone should mention it.