Something I really liked before 4.0 was the contextual dialogue with NPCs that changed to reflect your character's accomplishments regardless of current class. For example, although I played through most of it as a Ninja, I still got lines such as Y'mhitra acknowledging me from the Summoner quests when she appears elsewhere and Estinien's "two azure dragoons" comment, along with Yugiri's "I see you have been training in the ways of the shinobi". The way these comments acknowledged elements of my character other than my current class was really immersive and interesting to me.

In 4.0, lines like "you're a healer, aren't you?" during a scene with healing or "Fine work, X. Oboro would be proud." when you do some sneaking with Yugiri seem to only trigger if you are playing AS the required class at the time, which is a bit less fun, and "ruins my immersion" just a bit. It's a minor quibble but that attention to detail was definitely one of the things I appreciated the most in the game.