After newly getting into the mining game I think i'm allowed to have an input in this topic, I think that +1 regen is better than nothing, however I would rather they had put the +1 regen boost from when you successfully mine an item, I always try mine something in the downtime between nodes because its faster that just waiting for the GP to regenerate by itself.

Also I don't think it should be more any more than 7 GP per 3 seconds anyway, if it was any more than that there would be almost no reason to ever buy cordials.