I haven't had any issues with Ethernet, only with that atf change 
Sometimes taking a picture with your phone makes it easier to inspect solder joints. I can't see anything anymore with the naked eye, especially tiny fine pitched QFPs. I have watched quite a few repair videos where people find a few legs not even soldered down on QFPs, just floating and making contact. It's probably when the legs are slightly bent by handling or the feeder reel on the placement machine. QFPs are definitely susceptible to that sort of leg bending.
And from experience working for a cellular manufacturer when there are part shortages, you get pretty desperate and start salvaging these parts from returns/defects and you run them through a reforming machine. The fall-out on salvaged QFPs is pretty horrendous, but they do it anyways. It seems pretty crazy to me, considering you just pulled it off a board to put it on another board for it to fail again. But they definitely do it.
