Just delete stopwatch from the game already. At the least, delete perfect timing.
I'm really sick of seeing pro games where there are 10 stopwatches (either from runes or just bought for powerlevel) because the active is so game-warping. Every time someone would get picked in a side lane or the jungle but their team makes it to them because they have a stopwatch, I want to die. Every time someone ganks and you have to count a blown stopwatch as a success on that gank, I want to die. Every time someone towerdives top with their jungler and they stopwatch to negate the risk of the play, I want to die.
The item has already shown it's worth far more than the paltry 600 gold it costs (single stopwatches have won games -- that's not 600g), and perfect timing has already shown it's balanced into one of two states (never taken, or frequently taken by all 10 people). Just get rid of the damn item. An active as game-warping as Zhonya's shouldn't be this accessible. And it shouldn't be this accessible so fucking early in the game.