They've reduced the synchronization window by 67%.

This is mostly pluses all around. It's more consistency in general. But it does have some minuses.

Since rollbacks are less one-sided, the burden of a bad connection will be shared more often. And since the synchronization window is narrowed and the game is constantly updating ping now, that burden can introduce a lot of visual stutter and more dropped inputs.

Before we had massive teleports (instead of small stutters), but very few dropped inputs.

So the game looks more smooth to the eye, but it got slightly less responsive.