Bee keeping is all about conflicting advice. That’s what makes it a challenge
Although I don’t disagree with KathyP advice, my vote would be to remove the supers and just feed them 2:1 to get that top deep filled before winter. I’m in Zone 5 too; there's plenty of time for the bees to fill up drawn comb with syrup, or goldenrod. Drawing plastic foundation at this point and then filling it with syrup would be a different issue.
I wintered my deep hives with a single deep + 1 medium super last winter. With insulation, 2 deeps is more than enough stores for the bees IMO. I would harvest those supers for yourself and let the bees rob out the leftovers.