Currently, the rate of the Medals to convert them is 5:1. Of course it’s a good option to be able to do that, but I think many people will agree with me that it’s too much for the effort. I like to Explore and farm the Medals so that I can convert them later.
Now my suggestion: Wouldn’t it be better to reduce it from 4:1 or 3:1? Then it would still be difficult but much better.