The Gantt Charts are perfect to track your %completed and see if you are on schedule. The problem is that only the admin or users that can see all tasks can view gantt. Why?

Is is very important for a user to be able to see all the TASK that he isrelated with in a gantt chart. So with the %completed tracking he can able to report to manager that he will miss some deadlines. This option is available only on those the can access global reports and you disable the best feature to increase the employee productivity. Can you fix this?