I would be concerned about that U shaped melting spot right above the EGR tube. Even though it doesn't look as bad as mine you can't be too careful.
As far as right ups, there might be one but the real only way to fix it is to replace the whole harness with a known good one. Check the part out section of the classifieds to locate one as they are no longer available. Keep your original one and repair it as you have time. Solder the connections is the best way to fix the splices.
To check the harness I would start the car up, let it get to operating temp and then move the harness around to see if there are changes to the way it runs.