What won it for me was the fact that there won't be any of the old FFXI claiming that used to go on. Being able to join an impromptu battle and help out, whilst still being eligible for a reward is the icing on the cake. This is the correct way to get people out exploring the world, SE, not Fates. It's a long stride in the right direction.

I'm hoping its similar to fate bosses who get stronger depending on the number of players fighting it.