If they weren’t going to allow players to keep their full toolkits when synced down, I would think that redistribution of how skills are acquired would be the best option. It’s something I’ve actually suggested with a job like DNC to combat proc RNG at levels below 72 (pre-Flourish), and I think some jobs could benefit from getting skills earlier.

Content redesign will likely always be completely out of the question. Too much work, and the developers have rarely expressed interest in going back to old content and adjusting the scaling of it.