Yeah, I'm with Goarmagon, A lot of times on the offense or in stun you'd PP your opponent then not really do an optimal follow-up. The 3P+K option would be good along with stuff like 6PP~JAK~P/6K~JAK~P (or 6K~JAK~P+K, etc.) for example. 3P at R1F against Brad isn't really a good option because it's slow and Christie has much faster moves such as 6PP (Attempting to hi-crush Brad isn't really necessary in neutral unless you expect a "PPP, etc." due to the speed difference). By and large I'd say your Christie is coming along nicely and did see some good things especially in the 2nd half of the fight!
Remember your low tracking moves when fighting Brad and don't overlook 2k when he is lying down. Also go for more 3P+K mixups when you have your opponents in stun to stack your damage.
@:56; I'd no idea you could use that mid to get him out of that lying down stance of his, will make mental note. Like the combo U did between 1:07 & 1:14. For the GB U did right after I like to follow-up with a 8K, decent for a small juggle after... at least online.