No, he's not. He's exactly on par with all of those guys. Christian, Damien Sandow, Cody Rhodes, all of those mid-card guys that do nothing but trade wins back-and-forth.
What he really needs is a manager. Slap him with someone like Vickie & people would care about him. Mainly because it would at least make him different. He hasn't changed during his entire WWE run, sans dropping the Jamaican accent.
He is more over then sin cara and del rio. Plus he gets good pops even after floating around soon nothing.
Turning him heel would be a mistake I feel. I can't see him at all as a heel and different is not always better. What kofi needs is to be more aggressive like he was during his feud with orton