I've searched around a bit and couldn't find anything addressing this, so I wanted to just suggest to SE to nerf all leves, story quests, collectibles, etc for battle classes and crafting/gathering classes from PRE lvl 61-70 so that they cannot contribute to experience gained after level 60. This would ensure that people who prepare stacks of collectibles for gathering/crafting, for example, cannot instantly hit level 70 with turn ins, which would give them a huge leg up. If it's already a planned feature then great, if not then it should be (Heavensward had a similar problem where story quests/leves werent nerfed until a few hours after the patch went live, but some of the damage was done as people hit higher levels alot faster with pre-completed leves.

Thanks!