One thing that can contribute to larger debris balls/debris fallout seen on CC in these situations is that in South MS in the Hattiesburg/Purvis/Brookhaven area where these storms were tracking, there are a ton of pine trees out there. That region has multiple national forests and generally there's just a lot of hardwood in the area to the point where the region itself is sometimes known as the Pine Belt. Unfortunately, those two cells did appear to put tornadoes down in populated areas, leading to significant CC drops on radar, but debris balls in Dixie in general can be outsized just due to the amount of lumber available for tornadoes to pick up.