Okay, perhaps I am missing something here. Why would we want that bar on the screen? It is only for the actual camp Destruction Phase. From what I have observe, the bar only shows once is appears that the attacking group will be successful; then upon successfully defeating the enemies, it starts decreasing and displaying the take-down of the camp (not enemies, which are now kaputt). I have not seen it show the bar for sac waves, though other player have reported as having seen the bar pop up on sac wave attacks. This display to me seems superfluous. If there is an actual, thoughtful purpose, please let me know.
What would be useful is monitoring the combat: the strengths of our army and that of the enemies. Have to suggest, however, that if such a thing were implemented, it best be done on the sides and away from the map, don't want to interfere with other assignments.