The new race is pretty bad-ass. And I thought mist elves were a glass canon, but the idea of not raising hp and pv at all from toughness scores? And really poor LOS on top of that from perception? Well, it works. You pee your pants with every spellcaster but otherwise the temptation is there to get arrogant (except maybe with missile throwers, but they haven't managed to hit me yet). Also neat idea on the play on words: 'spryte' (from 'spry' and 'sprite') rather than 'quickling' (although other quicklings are still called quicklings... is this just a work-in-progress change?). I think it might be a good idea to slow the speed-per-level rate a bit more at high levels though, it would still be plenty.
I'd love to see more races based around extremes of playstyle, it only increase the replay value.