Just an idea that Fresh start worlds as a concept leads incredibly well into a similar seasonal style to games like path of exile (but not the same, we obviously dont want content limited to FSW), with varied modes of play on rotation. It would likely serve to keep the restarts reasonably fresh each time, and always an exciting experience.
For example, Darkscape as a few month experience would be great, as would Deadman Mode. Those are just PvP examples, but theres a lot of potential for alternate PvE modes, different ways to earn experience, region locks, limited inventory, ect.
In my opinion, theres a lot of potential for shorter, very different experiences that different portions of the playerbase might be interested in (because not everything will click for everyone). Im sure the devs/community can decide much better than i on fresh ideas to try out.