This is my personal opinion ( its not intend to harm or discriminate individual or beings or entity)
I prefer CARD BANNING/NERF method instead of adjusting rewards. The main issue certain cards has too much advantage in game ( A player will use that advantage to gain more wins and bots will emualte that winning formation as well) As case refence MTG ( magic the gathering) and LOL autobattle chess ( league of legends), both game regularly monitor ranking system by seeing which card/unit/creature/etc are constantly used and getting too many wins at above average or perfect win.
In MTG banning/nerf, since its both physical and digital, they schedule banning every quwater ( unless its emergency banning).
In LOL battle chess banning/nerf, its digital game and they adjust the card stats evry season by nerfing.
FOr splinterland case, we could use Nerf method by not disturbing the original card stats but adding another layer (nerf layer) on top of the original stats... think of it like equipment (shackle) equip on banned/nerf target monster. The task would need to constant review game rank in both format and every season. ( Example of lama + kron combo, since summoner are the heart of the game. the question vomes, to ban/nerf summoner or monster. My suggestion is either ban the summoner or nerf the monster)
As for rewards pools, I like to see grain or other future minerals be replaced which able to change every season 😁
I don't think this is necessary, at least for modern ranked. Reason is I think we've established that next season, Chaos Legion will be unusable then Rebellion + new set will be the usable ones in next pack season. So, everytime a new pack is released, the previous strategies will be unusable. As an example, since Scarred Llama Mage and Kron the Undying will not be available starting Dec 5, then people needs to make new strategies for that 17 mana sweet spot.
This, is still a problem in Wild though. The ban system may only be applied in Wild but that also will decrease the price of the said banned cards.
In the question of "who will do this?"
We have the community proposal. So, just have a survey or suggestion of what card you think should be banned. Majority should know what cards are overpowered. Or maybe take the opinions of those in the higher divisions.
Good suggestion.
Just one question: Who will do this research and decide what card will be nerfed in what way ?
You will do this in the future ?