This is the recurring problem I see on on this forum... too many people focus on speed and not features. Or noob's don't know what features to expect. And reviewers are guilty of cursory reports, often just looking at speed.Software-wise, Asustor definitely has a long way to go to reach feature parity, and seeing how aggressive QNAPs are in adding new features, it might be hard for them to catch up and keep the pace with them. They might be able however to still remain relevant by focusing on the more commonly used features.
To the above quote, we should add Synology. They and QNAP are evermore in very close competition.