1. Jobs are not required, you can play classes if you choose.

* Class-specific gear, which is also scheduled to be introduced in the future, cannot be equipped by job-switched characters.
This is SE pretty much saying that classes are planned to still be viable choices.

2. They will release more jobs at and after 2.0 so you can choose whatever job you want. Pre 2.0 is really just a test for features that will be in 2.0. I guess you could say we're in beta for 2.0. That doesn't mean the game isn't good, just means we don't have everything yet.