I second this, though I think the size of the button only needs to be 1.5x it's current size. When movement points for all units are finished for the turn, the end turn button should light up or slowly flash/shine. I should also be able to cycle through all units that haven't finished expending their movement points. An icon next to the unit should show up (next to their portraits) so I can also tell at a glance which units have finished moving. Well I know it's probably not called movement points, but you know what I mean...
In addition, it would be great to see how many grid squares I have available until my movement ends for a given unit. In other words, say a unit has 5 grid squares it can travel. If I select up to 5 grid squares, the path is green. Anything beyond 5 grid squares should be red.