Yes you're right that it's different in higher leagues vs lower leagues. In higher leagues it's much more skill-based and this particular issue is mostly found in the lower leagues.

Overall though, the general concept here is to require more assets to earn the max potential rewards. So the fact that some cards like the chicken don't require high levels is a bad thing in my opinion - there should always be benefits for leveling up cards, so this mechanism helps to provide that. Now there will be more reason to level up those cards.

For gold foil cards, I think typically the GF card bonus will outweigh the reduction from this change, so they will still be a net positive in most cases, and also hopefully this will provide more incentive for them to be purchased/rented even at the high prices.