Remove stopwatch rune
When a rune counters an entire class, it's not healthy for the game. Assassins fall off late game and they can't even have a strong early game because all their burst is negated by an item which everyone has. Mages need Zhonya's because they are immobile. After they get it they are harder to kill but until then assassins have plenty of time to snowball. ADCs don't need Zhonya's because they have self peel or mobility, supports don't need Zhonya's because they have shields or disengages and tanks are tanks. Now everyone has a free Zhonya's at 6 minutes making it almost impossible to gain an early lead.