My thoughts on FATEs are similar to my thoughts on guildhests and guildleves. I would like to see the system repurposed rather than replaced. I actually like the idea of turning fates into critical engagements like you would find in bozja and zadnar. Being able to participate and be teleported regardless of your position on the map is way more appealing than it's current state. Also them being more than glorified trash pulls is more appealing also.
To go along with this I would like to see normal trash in the world become significantly improved. Instead of being monsters you can go afk and let your chocobo kill, how about we upgrade them to be large significant monsters that perform very basic mechanics. Make them guarentee drops so if people need to farm them for mats its both more interesting and more reliable.
Idk just some thoughts I had that I thought would make the open world and fates more fun/interesting. What are your ideas?!