Expedition Merchants feel bad, Coinage useless

So, Exotic Coinage is basically worthless. Expedition merchants inventory cap out at ilvl 65 which is just high enough to be entering maps. Once you get into maps and start earning their coinage to buy things from them, you no longer need or want anything from them because the ilvl is too low to even use as decent crafting bases by the time you have enough coinage and artifacts to actually buy much from them.

I propose a solution for consideration:
Increase the ilevel of the items they sell based on the highest level logbook completed. This at least encourages interacting with their mechanic to unlock additional interaction with the merchants and lets us use the artifacts for more than just recombination.

You should read the wiki on Expedition. Several things in your post are wrong.