I’ve tried the target feature and it’s pretty neat.
One thing which might be very usufull and visual, would be to see the progress bar of the month. It’s easy to do, doesn’t overload the UI, and brings a lot.
This was something you could get on the EE account for example : a bar with days remaining, and a bar with the consumed data percent next to it. In a glance you could see if you were in advance or if you had to slow down.
I think that would help a lot ! Maybe a grey bar at the very top to see the month progress so you can see where you are versus other target bars. Much easier than the colors !