Just a couple things that aren't directly related:

Not all mining is done in shafts. Some is done in open pits and such.

Probably a reason we can't mine in Nanawa (I don't know if this holds true for Copperbell) is because if you do the class quests, you learn that the Mining Guild has tight control over who can mine where. That's the only reason I can think of why nothing was added in these areas (or a lack of time in actually implementing nodes here). It would be nice for in the future after you've been flagged for completing one or all of the quests that you could actually mine in these areas since you've more or less been accepted into their fold.

I myself am an avid fisherman in game and did it a lot in FF11 as well. Aside from eventually leveling Paladin, this was the thing I looked forward to the most. I don't mind the current SYSTEM that gathering has, but I think it needs a lot more CONTENT. Right now we have 3 class quests, a guild quest to turn in x item to get a minuscule amount of xp, and the company turn-ins. Guildleves aren't even worth mentioning as content.

When they introduce jobs and the quests to provide them with the equivalent of artifact armor, they need to do the same for classes as well I think. At the very least, for DoL and DoH since the focus seems to be shifting away from battle classes to their associated jobs and DoL/DoH do not advance in that manner.

In terms of fishing, I want to see one or two more boat routes that you can fish on that have a little more excitement involved, (read pirates and other nasties) some challenging quest to gain a badass fishing rod (maybe this will be in the achievement system?) and anything else they can think of to make fisherman and the others to feel like more than just a class to supply items.