Every other major Linux/Unix application (or minor one of any quality) that I
know of supports the command line option, "--help" as a standard to allow users
to figure out what the other options are. This is so standard and so basic, that
its absence probably qualifies this as a defect. 

The "--help-all" option should output something like this:

Usage: usr/bin/soffice [OPTION...] [<file> [...]]

Standard Generic Options:
  -? or --help              Show standard generic options
  --help-x11                Show X11 specific options
  --help-office             Show Open Office specific options
  --help-all                Show all options
  --author                  Show author information
  -v or --version           Show version information
  --license                 Show license information
  --usage                   Display brief usage message

X11 options
  --display=DISPLAY         X display to use
  -f or --fullscreen        Run OpenOffice in full screen mode
  -g or --geometry=GEOMETRY Create the initial window with the given geometry.

Open Office options
  -W or --wordprocessor     Start Word Processor Component (default)
  -S or --spreadsheet       Start SpreadSheet Component
  -P or --presentation      Start Presentation Component
  -D or --drawing           Start Drawing Component
  -n or --nosplash          Do not show splash screen
  -s, --server              Don't open any windows; instead act as a server
                            for quick startup of new OpenOffice instances
  -w or --new-window        Open a new window in an existing OpenOffice process

Well, you get the idea.

While some man pages would be nice, too, they are not essential.