Trading is very much needed

In my league last year, with me and 3 of my friends if we wanted to make a trade we simply dropped a player and picked up the one we wanted. However not every league is full of friends. There's nothing to stop someone else in your league from picking up the player you just dropped except for honor. Many leagues with strangers are sure to lack this. A trading system is a MUST even above that of an app which I believe is of utmost importance as well.