The Cure Tour 2016 - Facts & Figures

But you're right. They have not (ever) played it live.
Because....you know.....

EVERY Cure song is on tape.

There's definitely been more than 50% of Bloodflowers played.

5 out of the 9 tracks

My Japanese and American "Bloodflowers" have ten tracks, I think the UK version has nine, "Coming Up" is left off. So 50% is correct if you're basing that on a non UK release.
 Then again, the deluxe version has 42 songs ......................... cough.

Check out the first post. It lists "songs not played" if you scroll down.

Thanks. I hope they play A Letter To Elise some more times...