You can use the mention feature when writing comments on tasks. The person you tagged in the comment will get the notification even if he/she is not an assignee. Type @, then continue by typing the person's name. Select the person from suggestions.
List View in Calendar
You will be able to see the tasks in both your personal and group calendar as a list. The list shows the tasks in current week.
Displaying Client's Name on Home Page
In addition to the task's name, assignee, the group of the task and the task dates, you can see the client you tagged in the task in the Home Page.
You can click the delete button added to input boxes to delete what you type at once.
When you type in the task search box, it turns yellow. It is made more clear that only filtered tasks are shown in the tasks page, not all tasks.
In the reports section on the Home Page, you can scroll to see all tasks in the task list.