I think the BBC made an error in choosing Olly Alexander FIRST, and then choosing one of his songs. Vocally it wasn't great, and as impressive as the staging technically was, it was drowned out by just being a bit too jarringly sexual. But I think the main problem WAS the song - this was not a winning song, evident from the muted reaction when it came out relative to the hype and potential we saw when Olly was announced. Dizzy was a 'good' song, but there was never any real connection between Olly and the song - many people could have represented the UK with that song - when you look at the songs that do well, they're ones that are able to create personal narratives and feel very connected to their performers.
The UK is in a difficult position with how it's allowed to finance the competition, so I can't see us doing well without the support of an established act with a label who will provide the needed investment. But, time and time again, we see that picking a "name" does not work when the song/performance itself isn't first class.
The UK delegation's priority should be sending a fantastic vocalist with a song that creates some sort of story.