I'm mainly just posting this to throw more into the pool of feedback for Riot, but a few days ago I was playing TT with my friends. We had a teamfight that was relatively close around level 14 or so iirc.
The enemy Diana was the only survivor with around 100 hp. She then proceeded to take both bottom turrets, an inhibitor, and our altar before any of us even spawned to react. It blew my mind that death timers are so long that a single champion can accomplish so much before anyone can have the chance to fight back.