Due to the small dev team, devs can’t push out new content faster than it takes the player base to explore all of the new content, enjoy it and eventually get tired of it. Though, devs are doing their level best to give all players more, new content to explore and enjoy.
If we would put the lore aspect on a side, just for the moment, and look at the vendor/trader mechanics alone.
Then for trader to add value to the game, it should be implemented in a way, where what you get from the trader, are unique items, that you can not get from anywhere else.
Since if you could get common items from the trader, the same items you can freely loot from the game world ← all it does, is making player’s life easier.
One set of items, which trader could offer, and which hasn’t made it’s way to the game, as of yet, are experimental weapon attachments. As of what they exactly could do, topic here: Exp. Attachments
Other, unique items, could include new clothing set(s) and/or more different custom emotes. There are actually a plethora of unique items, currently not in the game, which the trader could offer. (Too sleepy to think any more as of now.)
And if to develop the trader idea further, devs can level lock different sets for balance. E.g you can’t access experimental attachments until you’re level 20.
Now, if we were to take the lore aspect in as well, then i have hard time seeing how we could have a sophisticated trade network in the world of GZ, ruled by the machines.
Historical resistance groups, yes, had their sources for stuff. But did they all buy that stuff? In the middle of the war? I don’t know. Other folks here in the forums have better knowledge of that historical aspect.
In terms of GZ, it’s hard to tell in which direction devs are planning to steer the game. The latest addition of base building, is already a huge stretch and in many cases, it doesn’t suit the lore. Here’s also my feedback of the base building: Resistance Update Feedback - #77 by Aesyle
The current FMTEL stations are essentially like vendors already, where you need to do X thing and in return, you get some stuff as a reward. In that sense, wouldn’t it be better to expand the FMTEL stations further, with unique rewards, rather than implementing completely new, vendors idea?