Honestly, there's nothing to see. We've got through the evening with no Downstream ES, obviously my line is very good quality these days.
DLM won't intervene immediately, it will let it count up first... also consider that when my line was impacted by REIN that FEC's run up into the 100,000's I think even clocked up to a million in one sync... however I only ever saw 1-2 Errored Seconds per hour...
ES's only really clock up for lines without G.INP, like upstream when in Fast Path...
I high count like mine did cause some issues, specially with online gaming and Skype for a little bit,
The first thing DLM will do is increase the amount if G.INP applied, currently your's is on 8... mine went up to 16...
I think that's currently the max amount of G.INP applied by DLM.
What's your stats at the moment now its busy time?
EDIT: PS. Consider that my line also doesn't have SNRm swings like yours and other do... it's no unusual for some lines to have swings in SNRm, specially those at a distance from the cabinet.