Trading Cards for PvZ Heroes?

I was just wondering if your crew have ever considered adding the mechanic of trading cards. I ask because I believe it will make the game so much better + it's really hard to find a Legendary card. One of friends hasn't acquired one as he has opened well over 20 packs and spent real money in the game. I feel the need to trade my legendaries to him. So, I feel really sorry for him, and I'm pretty annoyed that I can't do anything to help him at the moment. Please add the ability to trade cards with friends. Thanks in advanced! 🙂

P.S. Sorry I couldn't get the whole convo. Messages get deleted after a certain period of time.
P.P.S. I covered names and avatars for security purposes!