Since we've been seeing ETMY mode 1 (and mode6 to a lesser extent) increasing during lock stretches for the last 5 or 6 days, I've gone ahead and edited lscparams to use the new filter/gain configuration that TJ noted in 82337 - he does say in there that this configuration has been noted previously to cause mode1 to start ringing back up, but so far we have had a 20 hour stretch a couple days ago with these settings and didn't see any ringing up, so I think we might be okay.
I've reloaded ISC_LOCK and VIOLIN_DAMPING.