Interestingly, I find single-soled heels far more current than platform pumps. Flatforms are fresher, but the whole platform pump thing was done to death for a while there, and I just cannot see them as current anymore. That is MY issue, though, not anyone else's problem.
And it is hard for me to tell what is current and what isn't when it comes to heels because I wear them relatively infrequently, and I have always tended toward chunkier styles when I do. Block heels, flatforms (like creepers), lug soles - those are much more my style than stilettos, even when stilettos dominate the retail space. But when I wear daintier heels, it is always single soled shoes.
Regardless, my feet have become much fussier, and I am now mostly shopping for comfort over heel height!