The thing with shock boots (as opposed to shocking appearances in the bottom 2) is that they kind of need to happen at the first time of asking. When someone's been dragged through two dance-offs already (as Daisy was) it's not terribly shocking when they go, even if they were a relatively high scorer.
Of the four who went first time they were in the bottom, Melvin and Naga were crap, you could see how incredibly annoying Tameka was coming across from space, and Lesley was the oldest woman they've ever had on the show. None of that was terribly shocking.
At this point Danny would be a shock boot and that's it. Even with Louise, who seems popular, people would claim they saw it coming all along because how dull/beige/blah she supposedly is and how it'd be a great victory over judge favouritism.