Yea GP regeneration is definitely an issue. Would be nice if they made the gathering a little more in depth like crafting with the abilities lasting certain strike times, or just x amount of time in general.

You can re use your efficiency rate boost plus your success rate boost with every craft attempt. Why can we not do the same or similar with our attempts to gather HQ items. These boost allow you to produce HQ almost every time you craft which is why a crafter can level so fast.

Then a crafter can take a 3 item hand in leve and then continue it with the surplus. While DoL get a similar leve that grants us bonus xp based on our gathering grade. However this is only available every other leve and does not continue into a surplus.

All and all these factors slow down leveling a DoL way way to much in comparison. Not that it is necessarily a bad thing to not be able to grind out to 50 in a day but makes it harder for a DoL to keep up with demand right now.