Hi Ciaran,
The force new attempt allows a users to at least retake the module (much better than before).
We just can't utilise the exit and resume functionality (eg. if a module is 90 minutes and you wan't to break it up into 2 sittings) which works in the other LMS' (as mentioned).
Is the ability to resume likely to come back? If was definetly there is the early versions of Totara/moodle that we were using.