With all due respect, what you are looking for is nowhere near a 'simple CMS'. No CMS will accept content from Word without going through some sort of filter to clean up the MS styling that feics up most content. That said, many editors have a paste from word or paste plain text, that *if* used by the end user, will help.

As for central management, Drupal has multisites in its core (ie install and deploy mother website, and then deploy sibling sites based on parent settings). Some of your other requirements are possible with considerable tweaking, but overall you are looking at spending a few weeks (or 3 or 4 ordinary websites) getting to know a CMS and then trying this project - or paying someone to set up 90% of the system for you, and working on the last 8% over a few weeks. The last 2% you will not be able to implement, trust me

You will not get 'simple to use', from an out of the box setup, with your specific requirements, so my friendly advice is not to keep looking for a perfect CMS (there ain't any) but choose a 90% one, learn it well, be realistic, and work from there on the 8%

HTH

Best of luck with it