As an A20 digger, fatigue has already set in at under 15 stacks of greens. Zoning doesn't help, new chocobo doesn't help, going on 6 stacks now without a single item in 5 different zones. A10 diggers are reporting similar conditions.
On the plus side, RMT bots won't dig. On the minus side, neither will anyone else. And in what little I got to dig, 'increased dig pools' means tons more pebbles and insect wings and no extra money digs.
If this was intentional expect elemental ore prices to jump sharply in the next month or so. I can understand adding fatigue, but taking something that a lot of legit players (and bots, I know) spent years leveling and turning it into something that's barely a diversion is pretty drastic.
Maybe raised chocobos will let you get 100 stacks or so in a day. I wouldn't mind that.