I have the same problem. After the update to 10.82.2 it is really bad. When I have opened a note, and it has loaded, adding a line of text takes 5-10 seconds - on a decent 4 yr old Lenovo X1. I totally breaks my line of thought.
I have had Evernote open constantly, so any sync. issues should have been fixed by now - please help, or I have to migrate somewhere else.