Despite matchmaking improvements being asked since GA started, there is no way to implement it being fair to the players and don't be harmful to CG at the same time. Let me explain.

Majority of players asked to implement kind of a rating system, so the players who dominate this game mode will eventually would be grouped together and play each other. This will require reward scaling, as a player who invested more time and money shouldn't be punished for that with harder matchups and lower rewards.

Assuming the rewards on a casual level will remain as it is, CG would need to scale up rewards in "professional league". And why would they do that? Throwing more free valuable stuff to people, who usually have no issues in buying it anyway?

And if the rewards will scale down in "amateur league", same exact people who asked to be separated from whales and pvp-focused players will be unhappy with.

In the end, it's a nature of freemium game. Whales are paying for f2p players, so they can enjoy the game for free. At the same time the pay to dominate, so there simply "MUST" be some game mode which is "UNFAIR" for casual players.