As mentioned earlier, WWE selected to draft Sin Cara to SmackDown so he would be on a taped show and it could be easier to edit any blunders that he has.
That conclusion is created by Triple H as he sensed that Cara would certainly work out better on a taped show until he gets more used to WWEs type of wrestling.
A reference says that Triple H is getting hold of his fresh part with WWE talent development very seriously but is nervous regarding his first real project Sin Cara.