If they know that 50 or more percent of their next simulator will require demonstration of hand flying skill, maybe pilots will practice more on the line.
Which will result in more incidents on the line as pilots use aircraft to practice flying for the simulator rather than the other way round. A catch 22 situation.
With increasing traffic density and reducing separation minimums, manual flying will become impractical. The only solution I can see is to roster pilots into the sim every month and practice hand flying in there.