I wish people would stop bringing this up

Being blindly for or against trading is idiotic. There are ways it could be implemented without breaking the game. An unrestricted trading system would be horrible. No trading system at all sucks too. There is a middle ground. Now with that being said, is it worth basically reworking portions of the game and it's framework to implement? Probably not. But that doesn't mean there aren't good ideas that could be used for Destiny 2. Keep talking Guardians, let Bungie know what would make their games better.

And it won't get one.. moving on.

It wouldn't be bad if we had a massive selection of weapons and armor. The way it stands now though, you're right

make it expensive so it won't be abused. 10k glimmer, 16 energy, and 5 shards per user, per trade This way you will have to make a very limited choice to who you trade with and how often.