Updates are held back until someone is having a problem. If you were to suddenly have an issue with mounting a disk or a remote share, would you rather have an update or be told to wait until the next planned release? You aren't the only person using UD.
UD has to deal with all manner of USB disks, and CIFS and NFS connections to remote servers. Some servers are old and don't deal nicely with newer technologies. For example the many versions of CIFS. This presents challenges in dealing with all the varied issues from the many combinations of hardware and software.
While I can appreciate your thinking that the updates are annoying, just click the update banner and update, or cancel it until later. It's really not that hard. If it's that much of an inconvenience, uninstall UD and don't use it.