NB Being able to turn modules 'on' and 'off' now is a great feature for this. But I suppose the 'simple/advanced' feature would enable you to keep any of the modules but strip out a lot of the features that go with them:
e.g. A 'simple' new note would:
* remove: 'workspace' options (just post the note in the workspace you're currently in)
* remove 'tags', 'options', 'custom properties' options (not essential)
* have 'Subscribers' check boxes visible by default -
* not sure about 'Linked Objects', seems important but its not simple to use :-)