I agree, volk shrecks need their long/medium range changed to allow for actual kiting. Kiting is almost impossible and the slight (very slight) margin of range makes blob controlling damn near impossible.
If anything you could reduce the damage of the shreck if you don't want to reduce its accuracy but for right now it seems like 8/10 rockets will connect at max range.
Maybe do the same for zooks (careful tho cuz the 57mm is hell bad)but for right now Handheld AT is a horrible balance issue.
