Watching the dragon timer is pretty darn useful, but sometimes people just can't group for it
We all have the timer since we actually took the last two. Now why in the heck is it so hard for some people to not notice the constant pinging over the dragon pit 45 seconds before it spawns?
We have timers for this very reason!
If you hear a shitton of pings, it probably means check the minimap and check a timer because either something is under seige and a jungle objective is up.
And when we just let people get these objectives for free, it starts hurting a lot more gradually later on in the game, especially when it's contested super-late.