Quote Originally Posted by Silver-Strider View Post
Given that they've made significant adjustments to several jobs over the course of EW alone, you might be high balling that estimation greatly. PLD, SAM, NIN, SMN and MNK have all received changes, either at the launch of or subsequent patches in EW, alongside RPR and SGE being released so already a good 1/3 of the jobs have been accounted for.

Sounds like it would take maybe 2 expansions at best to accomplish this and 7.0 is probably less than a year away with DRG and AST reworks already slated for release so it doesn't seem as nightmarish as you imply.
But that is only part of the balance changes the OP wants. The whole thing being that you should be able to use your level 90 kit at any other level, including Sastasha. This does also mean that you have to balance not only the level 90 kit for all duties below 90, it also means you have to balance every point where a job gets a change with all the content below it.

In your list, SAM, NIN and MNK are balanced around the 90 kit, as they did not significantly change the low level experience. SMN and PLD were changed more severely, however, they still built them with the idea that you would be losing things if you down synced, so they are balanced at each point based on the kit they have at that level. A much easier task than balancing every level with every other.

DRG and AST will also be changed in the same vein as PLD and SMN, ie. changed to account for loss of kit at lower levels, which, again, makes it much easier to balance.