We don't know why KFC struggles so hard with coming up with new burgers. The classic and zinger are fine but this one didn't live up to the promise.
What let it down was the "mustard". Instead of mustard they did some weird Mayo with chilli thinking that "spicy is spicy".
Everyone should be able to tell the difference. Chilli is spicy on the tongue, mustard/wasabi are sinus clearer's. Totally different.