I think there should be widgets like Todoist and TickTick: With calendar/task views, 3 days calendar, just list of tasks by project, etc.

Widgets similar to Wunderlist where you can select list to display, complete task, add quickly task would be great

Agreed - widgets are something I'd like to see added too. For an example of what I've found personally useful in the past, I used the Evernote one quite a lot, as it allowed me to easily create a new to-do, while viewing my current list in order of priority - that was helpful, & I'd like to have that again.

A widget similar to wunderlist would be great.

Widget indicates who the task was assigned to OR only showed tasks assigned to me

Agree. Ability to pick which list to put into the widget. All. Today. Shopping. Etc. Also it would be very helpful to have two side by side lists in the widget view. Or even a calendar agenda in one column and task list in second column.

On the widget, category tasks by "all day" for the tasks you have to do on the day but do not have an hour, and "with time" for the tasks that have hours.

Widget to add task/ shortcuts/ notification bar