So... yes. Trading isn't very well received by most forum-goers it seems. But let me tell you why my suggestion is different before you grab the pitchforks.
My trading suggestion is that we should be able to anything
EXCEPT mythicals. The lack of a shop means many players can't get some low-level modules, and power kits are kinda annoying to get too. So, trading and gifting items (for a moderate token cost) could be a good way to get the items you want. You'd only be able to trade once every 6 hours or so, and gifts would have a delivery time. And again, you CANNOT trade/gift mythicals.
OK... you've reached the end. Feel free to say what you think now.