Hmm. I have noticed that, too.

Anyway, the blue icon was just for "Doit Now" which is a small optional section of Today. To make something to a normal Today action you previously had to click a star. Now you change the "Starting time" from e.g. Next to Today, which is a bit counterintuitive if you are used to GTD. In GTD, a Next action is still a next action for me to do even if I aim to do it today, and a Waiting for action is for someone else to do even if I am to have it delivered to me today.

It would be very handy indeed to have a quick-click icon for selecting tasks that deserve your attention, an icon that does not move tasks away from where they are, just make them more visible where they are and also let them be seen on the "Today" list. The Today list is also called Starred or Focus etc in some apps.