Check out vids by Pokerking87/Queen Jakheiho if you've not done so yet. You kept up the pressure throughout most of the match so kudos in that regard. You might even want to take a gander at Awesmics Christie tips thread, although that was for version 1.05.
Kasumis moveset is mostly quite linear, of course you could argue the same with Chrisites set; the Jakheiho (Jak) stance can be your friend here, it has minor sidestep properties & can open up many mind game properties then the old Snake Stance of DoA4. Keep in mind that if opponents try & jump over Christie she still has an attack, her back flip (7K). You'd be surprised how many people it catches off guard.
That's a decent Christie and I like that you are using string delay but there's a few things here that will make you stronger.
When juggling in the Corner go for 3ppp, you keep their backs against the wall and it lets you prepare some of her more sadistic setups(like 4P+K>>66T) You're movement is decent but you also want to work on your whiff punishment as well. I saw some 236P but you want to throw out Counter hit 2H+K and 46P as well because you don't want your opponent to grow too accustomed to 236P. Although 3P+K can crush mid wake-up kicks the spacing and timing is so specific and hard to do I typically avoid it. 66k is more reliable move to crush both high and low wake-up kicks but again you don't want your opponent growing to accustomed to it because they can violently kill you if you mess it up.