IMO one of the least-solved problems is communication. Two areas in particular: (1) lack of a shared real whiteboard, and (2) video-call quality. These are two areas where good solutions may exist at reasonable price-points, but if so that information isn't widely known. Not sure if it fits with your business model, but it would be extremely helpful for someone to carefully evaluate the effectiveness of various techn…
Amen to that. I recently was interviewed remotely, and the voice call quality was unacceptably low- I could barely even understand the questions being asked!