I saw these shoes on a woman in the underground yesterday and thought they might work with my terrible feet. I get lots of blisters on my heels so very little at the heel is good. But without a substantial shoes, my foot slips around and I get blisters on the sole as well. So I end up wearing ankle boots all the time, even in summer. But these might solve some of the problems - substantial shoe part but no heel, ties up so can be tightened, and yet sort of sandal like. I don't specially love the look of them, but better than ankle boots for summer!
It's a long long long shot, I know, but I'm hoping they might be a current style that someone has seen in the shops lately...