IMO they should nerf the range, but have a toggle where it shoots farther but with less precision/ damage/ fire rate/ combo of three for balance.
That way if you want to be really potent you gotta build it much closer than you normally would, but if you want it to be safe, then it suffers by being less than optimally effective.
Like.. this is already exactly how arty works: The further you are away, the less accurate you are. The mortar pit is already not that accurate at max range.