From Sirrian July 2017:
What is changing in the FUTURE for Guild Wars?
We’ve identified a few areas to change that WILL require a client update. This will NOT be in 3.1… we’ve got quite enough OTHER stuff going into that one, without the extra work! We may have a 3.1.5 shortly after 3.1 launches to add these. This is still in discussion.
The first thing is something you all talked about and seemed in agreement on (amazingly!), and it was only counting the top 27 players for score. We’re quite willing to experiment with that, but it WILL require a client update.