Please add the ability to un-retire shoes. Why? I recently retired a pair of shoes, then decided I'd give them one last go, only to discover after the run that I could no longer add the shoes to the run (sensible; it's good that retired gear doesn't show) but also that I couldn't even un-retire the shoe, add to the run, and the re-retire it. And now I have a run with no gear selected.

In the grand scheme of things, this is nothing, but it's fixing small stuff like this that can make an otherwise good product really stand out.