Currently in the Gantt chart, to add the duration of a task, you have to add the task to a day by clicking on the day, and then click, drag and drop to define the duration of that task, but this is not practical when you are planning a work, since the number of tasks is too large, the Gantt to be useful, should work together with the list, once you defined the duration of the tasks, the start date and the dependency, the chart should update according to the data.

Example: I have a task with an estimated duration of 3 days, when I click on the Gantt to add this task, it should already be added within 3 days, otherwise adding the estimated duration in the table is a waste of time, since I would still have to click and drag on the Gantt.

Example 2: I have all the tasks with duration defined, and task 01 with a defined start date, once I create a dependency between task 01 and task 02, the start date of task 02 is automatically assigned based on the end date of task 01, which is the start date + duration), and the end date of task 02 is the same as the start date + duration, and so on with all the others.

It's even strange to explain this, because this is the minimum of planning, today this update has to be completely manual, for large projects this makes its use unfeasible.