Originally Posted by Naoki_Yoshida
The issue where character movement routes are different on individual clients [such as that demonstrated in the YouTube link from the original poster] is not actually due to server lag, but due to a conflict between animation control and a process that supplements movement routes by using character coordinates and vector/speed.
Even with the current status, the server is working and judging coordinates and routes properly at the point of synchronization. (Coordinates are being processed with an intended frequency so that the difference in coordinates themselves is almost none.)
Therefore, corrections to the animation and the process to compensate movement routes will improve the cases like in the video. Improvements to the server-related issues will be another story. Although the previously mentioned correction will not be made in patch 1.19, it will be done after the patch.