I have had considerable trouble in the past managing mailservers which get
clogged by people exchanging m$ format files.  The system manager at my present
place of employment tells me he has the same problem to this day.

One common problem is the exchanging of gigantic files, Sometimes Word Processor
files or spreadsheets, but more commonly and extremely Presentations.  Naieve
users find a gigantic graphic, a photo or something, and drop it into place. 
They resize by stretching and save.  Before long you have a wp file of 5Mbytes,
or a presentation of 150Mbytes, largely wasted because the images are all scaled
down to a size that does not use all this detail.

I would like to propose a mechanism, automatic or manual [1], to re-sample
graphics to a size appropriate for the size at which they are displayed.  This
is a feature no other office suite appears to have and which I think could
represent a small but significant piece of incremental product innovation and
provide some  much-needed product differentiation.  It would certainly make
friends among system managers.

[1] At home you would probably want a dialogue during file save "Do you want to
resize embedded graphics to a more appropriate size?".  At work some system
managers may want a method of enforcing this as a policy without user intervention.

Another possibility would be a dialogue when a graphic is de-selected after
resizing.