A nice user interface enhancement would be having desktop icons making it
easier to access partitions not listed in /etc/fstab, f.e. partitions from
other Linux installations or from Windows.
The right enhancement here would be a "add partition to /etc/fstab" wizard or
something. In the meantime, just add these partitions to your /etc/fstab
with the "noauto" flag, so that they won't get mounted by default.
Not something planned to add in the near future.