I dont know why this has not been implemented yet. It is the same as when hero classes were global. Literally one of the worst features in the game (besides all the skull bugs I cant get fixed).
Why is it so hard to understand? During guild wars week we use certain medals for certain teams. They are rarely the same for offense as they are for defense. The stupid world event medals are even worse when you forget you had them changed and then go to bed and wake up the next morning to find your goblin defense is 0/10 because you have no cleanse medals set and everyone just froze them and ran them over.
I am really tired of so many things being so screwed up. When over half your player base agrees on something it should really be thought about.
I have to touch on this again. Guild wars is the WORST for this. People literally wait until your medals change. In the higher brackets all the time people get their matches in quick when someone in a guild is on discord alerting everyone that your medals or hero trees are set wrong.
This stuff really needs to stop. There should be a little spot at the top of your team where you set your medals and they are team specific.