The werfers really do provide terrific fire support but they have to be brought up quite close.
I'm still not convinced that the NW need to be redeployed. The EstabEditor shows they only have Bombardment capability, not direct fire, and their Accuracy is not greatly increased unless you bring them within 1 or 2 thousnad metres, which is around about enemy Mortar range. Given the projectile wreight is so great i wonder if accuracy is such a concern. In fact, could an inprecise weapon not be more useful, in this situation, given that the american units are often grouped around the VLs?
Regardless, when you move the NW forward do you put them under command of the Regt or Bn HQs? I have tried attaching all the artillery to either the 751/753 Regt HQ, along with both Bn, so that the two Bn attack together, under one Regt HQ, with all the artillery directly under control (with "direct support only" ticked). I hoped that doing so would speed up or increase the chance of AI firemissions being called in, at the right moment, but am not sure if it actually had an effect, especially since the motorised artillery units tired to use the Monschau bridges to redploy to the south side of the river!
I tried this because i enjoy leaving as much as possible to the AI as micromanaging seems a bit gamey, especially with artillery being so powerful that the player can just mass his artillery units to break any enemy unit like he were god.