I replaced cable, modem, psu, turned off ups, tried test socket (like how the new sockets just clip off), turned off my stb, and I dont think the noise is local. Also unsurprisingly the GEA line test passes.
It seems to have no affect on QLN, hlog, or sync speed itself, just errors on the line, so I am now having to accept been interleaved for the foreseeable future. The bit of good news is even with the 100s of thousands of FEC and the thousands of CRC I was getting on fast path, the interleaving is mitigating 99% of them. If I had g.inp I expect this would be a non issue.