(This is not about exotics. This is about abilities.)
So... Titans? There are one-shots with melee and much more mobility with dash. Grenade with great damage and great lasting time. AoE ultimates with big lasting time and tracking. AoE melee that can one-shot (new Arc tree).
Warlocks? Healing rift, blink-jump, long-range melee, shotgun grenades. AoE ultimates with big lasting time and tracking, also healing after kills with some of them.

Hunters?.. There is your awfully useless dodge with 30 sec cooldown, there is no healing abilities except one exotic helmet (with tiiiiny heal after dodge), there is your knives with poor range, damage and velocity. Oh, and you are potentially slower than any other class (especially meant-to-be-heavy-titans), because you need some resilience in your stats to survive at least 1v1 gunfight.
Ultimates? There is your arc stick that lasts 3 seconds when you spin it and you can't even chase your enemy because they all are still faster. All Hunter's ultimates last less than any other classes ultimates. Except maybe new Void ultimate. Yeah, "sneaky one", but you are still visible, loud as hell, also it has poor tracking and even can't one-shot in PvP, like, all the time.

Please, Bungie, give us at least something. We want to have just as much fun as other classes.