I would love a system, much like what people are saying, much like campaign from XI where as you play the game, do fates, etc... the whole server is making progress towards victory, and as we make progress certain benefits happen for players (more xp, cheaper teleports, better prices on items... etc... really lots of options here) as we lose progress, we lose those benefits, etc.

I'd also like to see server wide live quests, much like fates, but not restricted to anyone area.

Like, kill 1000 dodo's,
Run 100k Dungons...

I don't know what the numbers should be mind you... But as players play the game, these get updated for everyone on that server... Once completed the other phases open up, and when completed you get rewards for participating, based off of your participation.

I'm super excited to see what Stormblood brings.