Ive stumbled recently over this game which is a remake from a 2012 game and they solved how to do gathering already in the original in my opinion:
-resource nodes have hp bar
-you have attack skills dealing different damage
-overkill damage gives bonus loot
So you have to empty the hp bar as low as possible without hitting 0% through right combo of weak/mid/strong attacks to do a massive last hit for maximum loot.
the system is trivial to understand but engaging enough because the optimal hit combo changes due variance from resource nodes hp values and you upgrading your gear for higher damage.
They also extended that system with 2 additional mechanics but those are less interesting - typical ult attack for massive hit with energy loading on every hit. And a "sweet spot" mechanic dealing double damage if you attack the node at the right spot. The latter aren't that important but make it a bit less monotone.
I think they solved how to do gathering and yet i never heard of this game despite the original being over a decade old now.
This made me think there is likely a lot more out there that is getting less attention than it deserves. If you have anything you consider under appreciated please share