Mudras are crazy fast now. Mages still can cheat by moving before a cast actually ends.
Since I never had any trouble getting out of AoEs in the content you asked about (which is the main reason why I believe that people either have bad hardware/connection speed or just suck at playing, location based lag isn't at fault..) I can't say I see any difference, but for most people living in Europe, their ping went down to 20-50 ms, so it's a lot better.
But people still suck, so don't expect any big changes
Had one just for fun Titan EX run today and 5/8 people still fell down through landslides..so the only thing that's different now is that they can't blame the server location anymore <3