Celerity 3 is three times the speed of a normal human, thats faster then most local speed limits. Go ahead, reach out and snatch a pen from in front of your eyes... Hand moves pretty fast doesn't it? Imagine trying to spot that hand travling three times faster. A blurr? Impossable to see at all?
No, Celerity 3 is more then sufficent for anything I've seen her do. That being said, maybe she does something awesome in the second film, cos God knows I don't make the same mistake twice, and they aren't getting a cent of my money for a SECOND slap in the face.
I didn't think she was that pretty. Nice dark hair, cut too short. Average features. Thats personal opinion thou of course. Her costumes didn't do much for me either.
It's not required that a person lose humanity instantly upon becoming a vampire, however it does happen from time to time... Mostly because many sires are ruthless about giving up their own blood and would rather put no more then a few drops on their childes tongue so that they wake up starving and in frenzy, then let them slack their thirst on a few humans... Hey presto, you wake up surrounded by corpses you just drained dry, humanity loss.
But you don't HAVE to lose humanity. If your sire makes sure you have a full belly, you'll just wake up and feel strange and empty and cold... It's not untill you have to struggle with the beast that it starts to exert dominance. Also, it's quite possable for a vampire to go UP in humanity. You may have been Embraced at humanity 5, dropped to 4 and realised that this was "A warning from God" and put a change to your ways... Risking everything to save mortals, drinking only what you need, a life of charity and meditation, you could end up at humanity 6... The act of fighting an inner beast letting you really understand who you are and the hardship you've caused.
As for what happens in the Embrace, it's often left up to the Story Teller to help the player understand that... And curiosity about how something effects someone like this is the first step to playing the game.