I really like her interactions with all the cast. While Jadzia was certainly a very chilled out, enlightened character she was never smug about it like some TNG characters and always sought to enrich the lives of those around her.
I actually really like Ezri so I dunno if I'd have kept Jadzia on for S7 but she definitely deserved a better death than by the hand of some random pah-wraith. I do think there is something to be said about giving characters pointless deaths as most people in real life die pointless deaths with no greater significance or sacrifice, but I wish she'd had a more interesting exit. The character was awesome and deserved a lot more.