I would say that a lot of people are commenting on the need for changes because of our "modern gliders". My glider is from 1976 and is 34:1. Hardly modern but roughly double the performance of the ships that were around when the badge was invented.
What I'm trying to say is if they are changing it for that reason, then this is 40 years late.
I'm with Tom. The silver badge should have remained what it is.