Whats the point of counterbarraging with anything exept of mortars( i know mortar has more range) do you get some sort of buff from just maunally aining the arty you want to barrage? Or is it just easier to micro? Would be nice if someone could clarify this
For the Panzerwerfer, just easier micro and a bit more range (160 m instead of the regular 120 m). Scatter and damage/AoE damage remain the same though, so most of the time you're better off closing in a bit and barraging manually to reduce spread if you plan to actually hit something. AFAIK it also has the same recharge like the regular barrage, so no gain in this department either.
The only unit that gains something substantial from counter barrage is the leFH, which gets more damage compared to the normal barrage (200 instead of 160).
Edit:
Apparently the leFH counter barrage also has a lower FoW scatter modifier (1.25 vs 1.75), which together with the damage buff should make it quite a lot better at retaliating against enemy artillery than the regular barrage. That being said, I'd probably not bother with CB for other units though.