Repetier Host is a great program but could of course always improve.
I would personally wish that temperature display could be displayed with 3d display while printing so you would not have to switch between 3d and temperature display and temps does not necessarily need to be shown as full screen.
One suggestion could be that log display could be toggled with a compressed temp display so temperature is shown under 3D, replacing log display, as log file is normally not used for other things than debugging (to me).
I would personally wish that temperature display could be displayed with 3d display while printing so you would not have to switch between 3d and temperature display and temps does not necessarily need to be shown as full screen.
One suggestion could be that log display could be toggled with a compressed temp display so temperature is shown under 3D, replacing log display, as log file is normally not used for other things than debugging (to me).