So playing against it since the patch was released and it still felt too good. Looking at the notes, i can see why :
Cost reduced from 260MP to 240MP
Range reduced from 80 to 65
AoE near distance reduced from 1 to 0.75 (both attack and barrage)
Reduced the rate of fire of the barrage ability to OST mortar levels
Pack-up time improved from 1.9 to 1.1
Set-up duration decreased from 1 to 0.5
Veterancy 0 now provides access to a Smoke Barrage ability with 65 range
Veterancy 1 reduced scatter bonus replaced by increase to Smoke Barrage range (80)
Removed certain accuracy bonuses at Vet3 that would further increase the accuracy of the mortar (over other mortars)
Notice what is not changed ? Scatter. Scatter was the major issue of the USF mortar since it was so absolutely accurate it could instantly wipe most of your units, and the scatter was not touched at all with the mortar, range, AoE, but not the fact that it could directly land hits on your men and support weeapons.. Which it can still do with ease, meaning that combined with the reduced pack up time it can actually just quickly run up, wipe your support weapons then retreat.
In fact it is beyond me why the scatter was never touched when that was clearly the main issue and still is. It pretty much negates German mortars and any real counterplay against it.
So it still needs to be nerfed, and nerfed properly because the core issue with the bloody thing was never fixed, which was the scatter.