[Blue Fates] A larger, more involved fate.

[Jinzuki]

Sounds interesting but it also sounds just like any other FATE. When you think of it though we already have "blue" fates being Odin and Behemoth. Albeit those are only a boss FATE they have the large scale similar like what you propose. I can only imagine lag, jittering sound effects and not being able to see half the mobs/chars though.

edit: what'd I like to see is an alternative to FATE grinding. It could be boosted dungeon exp, separate dungeons for leveling or reintroduce the party system from ffxi. Anything other than FATE's