As above, if these 'bits' you're pulling out were in thier mid term and haven't bothered to do anything about them (family and personality clashes permitting) then they realy haven't got a leg to stand on. Mid terms are for 'course correction' and often involve (in my own recieving end experience) some points to work on. If they show NO improvement over six months and taking into account any 'outside influences' then they haven't tried very hard and can't complain. They had the six monthly brief, they should know the score.
Please be aware though that you will deal with 'career stopper assesments' and that what you do next will affect 'they's' life. Please examine all options open to you.