this is a simple, yet effective suggestion increasing the trading community's QOL while also helping things stay valuable. the only 2 things are simple changes:
1: make it so that you cannot paste maps that have rare blocks in wilds.
2: make it so you cannot copy maps with more than 5 rare blocks in community worlds.
these 2 changes would probably be controversial, however i guarantee that if you were to ask ANY active member of the trading community, they would agree with these changes. this is so you don't have little Timmy and little Jerry spreading things like wildfire, so that "rare blocks" in the game won't lose their value, making them stay rare. the reason I said "more than 5" in community worlds is since some builders may still implement them into their builds while still being able to have people copy their map (if they want to) that's basically the end of the suggestion, so share your opinions or some other changes you would want.