Really not that bad? You can't interrupt casts of 1 second whereas on APAC servers you can interrupt at 0.2. That doesn't include the infamous melee lag where you're standing on the person yet you can't hit them half the time.
How do you purpose a player adapts to that? Move to the US for better ping?
well, we do have 200ms ping science launch connected to US server,
we still play,
but at APAC we got 593ms ping.