Dragon, Baron Global Sound Update

I understand the desire to make both teams aware of when dragon and baron will be available. I like that. I also understand the desire to punish teams that fail to ward objectives / reward teams that effectively clear out vision prior to taking an objective. So, why not keep both? Instead of dragon screaming when he dies, why not have him scream that he'll be back for revenge 2 (or whatever) minutes prior to his spawn? Don't reveal what the team is doing until it's long been known, yet still get teams reacting to upcoming objective battles.