Thoughts on Level Squishes

[DPZ2]

But even so, I'd say they would need to at least adjust the experience so the pre-current-expansion levels could be earned entirely with the MSQ and the dungeon completions required for the MSQ;

Your wish was already granted. You can now run from 1 to 70 by doing the MSQ quests, which include dungeon/trial instances, alone.

If you enjoy the side-stories and doing daily instances, you can also raise up many of your alternate jobs at the same time.