I get what u mean bro..IMHO, the overflow is mainly not for bigger waste to flow into..waste in DT will b break down instead of flowing into overflow..what the sump filter sock mainly do is to filter the "dirty" (waste break down water) water instead of catching the big waste..
think like this, when u feed, will all the food flow into the overflow like the fish waste u wanted it to be?..I believe ideally is the food will flow around in the DT for fish to eat instead of flowing into the overflow..the excess aka uneaten will break down like the fish waste.."clean" water in sump will mix with "dirty" water in DT so higher flow is better..