pdt:
It's hard lol. My new couch is already falling apart, but luckily it has a very good warranty. We're gonna ask the guy if he can reimburse force the frame while he repairs it, but otherwise we'll probably reinforce it ourselves with strategically-placed cinder blocks or something.
Anyway the point is that it's an expensive couch with supposedly hardwood material, so all you can really do for some pieces is be careful.
Thinking about getting a piece of plywood 1/2 or 3/4, and adding it below the cushions. It should stiffen and level it all. I think my problem are the springs under the cushions.
