Jim,
Thanks for the great feedback.  We do have that on our Wish-List and I just made a recommendation to make the Towers larger and possible even shade in the red circle.  I'd even love to see only the Tower in concern be shaded,  example if there is a tower 3 miles behind you, do you really need to see it called out.  Maybe we show it if within a set altitude and then only highlight it if it is near your track or flight path. Just some thoughts.  Stay tuned, this will likely be added in the near future.