I'd really like to see fates be either more varied or more interactive. When I think of fates I actually enjoyed, outside from Odin and Behemoth the only ones that come of mind are the long chained ones like Highbridge/Dark Devices/Svara, or some of the 'big bosses' that would hand out minions (which few people actually do now). I don't really see anything horribly wrong with the normal ones though, other than they just very memorable even though I've done them dozens of times for some grind or another.