Here are a few ideas about improving Adventuring Fellows.
Please allow Fellows to enter more areas. Recently I was helping someone obtain their Artifact gear by hunting for coffer keys. We started in Castle Oztroja. I had called my Fellow to make the process go more quickly. Though getting the key took longer than usual, the process was less stressful than it might have been thanks to my trusty Fellow. However, after moving on to Davoi and the Monastic Cavern, it dawned on me that my Fellow could not be called in the area where we intended to hunt. Why the disparity? I have also lost my Fellow on several occasions due to zoning into an area where the Fellow is not allowed, even when the new area does not seem significantly different from the previous, for example Qulun Dome from Beadeaux or Dragon's Aery from The Boyahda Tree.
Please consider adding more 'Merit' like bonuses for Fellows, to be purchased with Fellow Points. The recent extension of a Fellow's kill count and time limit were greatly appreciated! However, sometimes their capabilities are slightly lacking. I understand Fellows are meant as a temporary assistant and not an outright replacement for human party members. Still, the option to augment some of their abilities would be helpful.
Also, please add more 'fashion' options for Fellows. Now that they are able to accompany us to the Near East, it's time they dressed the part! Give them access to Assault Point, Nyzul, Salvage, and Einherjar gear, and new weapon models as well. More 'unique' items to buy with Fellow Points would be nice, too. I'd love to outfit my Fellow with a Moogle Rod, Moogle Shield and Moogle Cap all at once!
Any thoughts on how else to improve or modify Fellows?