Question, if it's a performance, then why is the component not listed. I know visual is the obvious choice, but then again, countersong is obvious but they list audible for it.
Also, there's the issue of what is replaces. Bardic Suggestion is something that happens during another performance. Does the fact that Bladethirst replaces suggestion infer it is used during another performance? If so, then what? Certainly it wouldn't be Fascinate.