Meant to write 160+, my bad.
Fact is that OKW doesn't have AT squads that can be a deterrent to light vehicles like re double zook, Panzergrens or RE, but Raketenwerfer is the worst at guns against light vehicles, while being more or less in line with others against mediums and heavies, is another leftover of bad faction design.
Looks like it has similar stats to the 6 lber (Pak 40 is the same), with 10 less range and about 10 less pen. for 3/4ths the cost its not bad, and its shooting Allied armor which has lower armor.
The issue with LVs is their speed, so the extra range gives the AT gun time to track, fire, and wind-up before leaving the AoE, letting the AT gun get a shot before being flanked.
OKW at least comes with Fausts and T2 Puma for controlling enemy armor outside the Rak.
The Rak is now a budget AT gun with alright statistics and no gun shield (the gun shield doesnt work consistently anyways), but retreat lets it play dramatically more aggressive than a normal AT gun. I'd suggest remove retreat and let the Rak keep its 1.0 RA vs the 1.25 of all other team weapons. That lets you run somewhat away from a rushing death blob.
This brings back the Puma for value, the Rak if you think you can outplay enemy LVs, and finally the P4 for Medium Tank superiority. And removes the incredibly obnoxious immortal 3 rak gank squad.