wasn’t the biggest issue with the ESB grindhouse that there was uneven fading? I recall several scenes on dagobah where the pink and green came in and out in different parts of the frame. not sure how a single pass color correction could help? have you checked those bad scenes to see if your adjustments make those scenes look the same, or worse? if it makes those types of things worse, then it probably isn’t worth working with the ESB grindhouse any further. if it doesn’t affect them, then i say continue on.