They definitely need to add proper AT, Germany was the only one that had AT at one point. That’s the whole reason why the USSR wound up with the panzerfaust anyways. Because the PTRD and PTRS wasn’t doing enough.
The only reason the Americans are suffering in anti-tank is because they don’t know what to add for Japanese. When it’s honestly that simple, It may not be the most practical but it’s the most realistic and the best option that they have if they want to fix anti-tank.
They just need to give Japan their 81 mm recoilless anti-tank, and give the Americans their proper anti-tank in return. This way they can’t say one faction is more overpowered than the other. Because both of them are still going to pale in comparison to the German rocket launchers. The panzerfaust 100 has a easy 220mm armor pen. And the ofenraur ( however it’s spelled) has 200. So the least they could do is bring the Americans and Japanese above 100 mm. 140 mm is more than enough to penetrate a tiger 2 (h), a perishing, and the Ho-Ri reproduction you just have to know where you’re aiming.
even if it was shit weapons, they didn’t make fake weapons, maybe never build, but blueprints existed at least inf all weapons we have, what you said about “doesn’t matter since” it’s absurd and stupid