I'm just going by the wording of the official statement which makes it sound as though there is currently "virtually zero latency" already in the game.
They say that the result of the overhaul are the anomalies and issues users are reporting, so it seems clear that fixes to the overhaul are coming, not the overhaul itself which apparantly shipped with the game.
Anyway, it's good news and shows they're actively working to improve the online gameplay.