I started to use MC. My previous file manager had some bugs and it is not developed any more.
My first suggestion is to change color of progress bars after pausing copying/moving. Now they are always blue and can be i.e yellow during pause.
My second suggestion is to add possibility to clear filter (right bottom edit box in panels) by pressing the key, i.e. ESC. Now I have to delete filter by pressing Backspace few times or select all by Ctrl+A and delete by DEL or Backspace. In my previous manager i could clear filer by pressing ESC.