Personally I hope it never comes. Either the people with 350 hours or more will become monopolies and subjugate the entire non-29 and lower community, or everyone will get max level and be bored with the game.
There's a reason why everyone complained that this game was dull after the first month. Because they rushed through everything and didn't grow as they experienced.
So, the trade system will eventually be established I'm sure due to the immense demand for it, but just like voice chat, nobody will use it for long.
The only trade I want to see is like in wow, you have one hour to trade raid and strike drops with the people that played the match with you, and that's it.
I guess that's possible, but odds are that would still shorten a lot of people's time playing the game.
Yes it's artificially extending the games lifetime. But it's supposed to be a grindy game, so you feel accomplished when you succeed.
Plus, if that were a thing, 30s would suddenly be needed to go on normal raids. Why?
Well to give the 26s their raid gear they don't need obviously.