If you only care about battle content, then I guess the long term goals would be to collect all the extreme primal mounts, collect glamor gear sets from Odin, collect Dreadwyrm gear if you ever find a good Coil group. I guess that's all.

The game last forever if you take interest in everything it has to offer. It takes a lot of time to do everything related to gathering, crafting and the Gold Saucer.