...rather than you current standing. I'm thinking... That's how medals work. It's intuitive. It's feel more rewarding that way, something you get to keep. It'll encourage more deck experimentation; you might drop a bit in the rankings trying new stuff, but it's cool. You've still got your awesome medal. It'll encourage top players not to retire once they've got an amazing score. After all, you've still got your awesome medal. You've still got your awesome medal. You've still got your awesome medal. It just makes sense.
I took a quick look at this and, while possible, it's unfortunately not trivial to do. We don't track your maximum rating at the moment.
I think it would be nice to know when you're dealing with someone that's fallen on hard times or someone that's playing at the top of their game, but I can understand why it's not particularly urgent.