Also, to add to my previous post:

It's great that you can say that you can show many successful modern MMOs that support what you're saying. That tells me there's plenty of games you would enjoy playing. However, do not ever mistake copying other games to be the only measure of success. How successful an MMO is going to be does not, and will never, depend entirely on how successfully it takes features from other successful MMOs.

Successful MMOs can be observed as a reference only to have an idea of what the idea is behind successful features/aspects of them that players like. Only a reference. True success comes from solid observation and innovative design, not copy pasta.

Saying FFXIV will not be successful because it isn't grabbing the same loot system that other successful MMOs have is presumptuous.