They should have made the mortar more accurate, less damaging that only kills with direct-hits with higher drop-off with more ROF and less range. This way this would differentiate itself from the pack howitzer by being meant to displace units and being light support while the pack howitzer is what you want to break fortifications and actually kill units.
More accurate? It already pin point wipes grens in cover. When I hear a mortar shell being fired when against USF I immediately move my grens cuz a second later a shell lands right where they just were.