It's awful. There's 1 thrower inside the truck, 2 of us on the back of the line, 3 on the front. Sometimes our TL will help the thrower and she'll get us empty u-boats or flats if needed, swap out the full one. I've said only half-jokingly that it's a good thing most of us are thin - the u-boats are crammed so closely together that I'm often going in between them sideways to put stuff on them. The HBA & beauty ones are at an angle because of what's under the steel right there.
I'm the lucky duck who sorts the 4 (kitchen/pets) and combo repacks and I think this is the stupidest way ever to handle repacks. We've learned the hard way that we have to open every single repack; too many are circled 3 for domestics and it's nothing for that area or circled 1 for pharmacy and it's toys and sporting goods.
I feel sorry most days for the women who break out soft lines repacks - and sorry every day for the couple of us at that end of the line who stack those boxes. The piles get insanely high, and that's even with us taking the 2 items out of a green repack and throwing them in with other stuff. We're pretty good about stacking them well, but we've had some fall over - never on anyone, thankfully! (Can anyone explain why the DC sends a green repack, which is a dang big box, with 1 small item in it?)
As far as someone not getting their stuff off the line, do you mean a random box that someone should have grabbed and didn't? Our team is usually pretty good about it, and we float back and forth along our side of the line if we need to. One good thing I can say for our inbound team is that as much as we all tend to grumble about the new unload process, we really do work well together. Took working out some kinks, but that aspect is pretty good now.