I believe it's all been mentioned before, but the problem with Kelly isn't the T&A, because like it or not, it has its place. The issue is with the fact that her segment is like dead air. Just there to fill space until Knox inevitably comes out, it's a poorly thought out use of what little time is available to them.
She's also horrible in the role, she can't dance and put on an entertaining tease, not to mention being so young and inexperienced. Completely inappropiate for the role to the point of looking like a deer in headlights.
And where can it all lead, realistically? She possesses no skills required even of valets, can't take bumps, etc., has no ring experience under her belt and has been said to look lost even during catfights. The only conceivable storyline that could come out of all this is just another lame, unimaginative Test vs Scott Steiner-like jealous boyfriend thing where Kelly likely can't even do as much to stay involved as Stacy did.