Is it possible to set the Pool window to be always on top?
I.e. when the Pool is opened over a big Project window,
then each time I press the Project area, the Pool is hidden in the back.
No, you can only do it by resizing your Project and Pool windows so both are visible. You can save this as a Workspace so perhaps this will do for you.
I am one of those who would like to see the Pool included in the Racks panel. Vote here, peeps: Steinberg Forums