Trading covers?

People in my alliance were talking about trading covers, and I think this would be a new and interesting aspect to the game. I was thinking that you could trade covers in your alliance as so. Like a 2 start cover for a 2 star cover, 3 start cover for a 3 star, and so on. It would be interesting if you could do something along those lines, or switch it up were you have to have one of that cover to receive another from a trade. It was an idea we were throwing around, and might as well ask everyone. Give me your opinions, let me know if this is something the developers are interested in, and the players.

It would be nice to have some sort of option to trade, either with others in your guild if you’re in one, or through some sort of vault where you spend some hero points to swap for a cover you need.