Am I playing the game wrong?

[MagicalChase]

I am a new player (highest char @ 36) and I feel like I'm not getting what I should from the game.

1. I gain so much experience that I level way ahead of the MSQ which results in being synced, which in many cases removes the functionality of the spells I've earned. It also deters exploring the world and doing other quests as I detest having spells available then having them turned off. That is such bad form. How can I prevent this?
2. The game is too easy, near zero risk of death. I believe I've completed 4 or 5 different dungeons at this point and they've been super easy. Open world game play is even easier thus far. Is there a hard mode so a decent challenge can be achieved?
3. I have transitioned from rogue to ninja and lancer to dragoon thus far. In both cases the game play didn't change. I thought the new jobs would be more transformative, did I miss a quest (or quest chain) that would have made it be more game changing?

Thanks

This is the result of years of streamlining. It is literally designed so nobody could possibly be left behind. The result of this is you also have people at end game who have 0 clue how to play the game.