What's the use of Diamond rank?

@HansBurgers 

The point of this rank is to do exactly what you're having a problem with.

It's designed to divide those ranks between the lower ranks due to skill disparity.

From Rookie up to Plat you won't be learning a lot to get a higher rank, this makes sure that newer players can still get a sense of progress whilst they aren't really getting that much better.

Diamond is designed to make players get used to the short exponential learning curve that they'll find when they reach Masters and so forth.

Learning to use proper comms, certain tactics, playstyles and so forth.

By removing Diamond you'll be assigning either Plat to take over the job of Diamond or you'll make the learning curve even steeper as Master will become the gateway despite it being much different, thus resulting in another issue.

Adjusting the ranks themselves wont help much, changing something with the matchmaking is a  realistic goal.

Though there also is the chance that you're getting higher ranked players in your matches due to there being less players of your own skill in your ranking, meaning that you either get long queue times or short queue times with lower quality matches.

The game also tries to balance the lobby itself more, as an example they could put in 1 pred squad against a larger number of lower squads.

Whilst numbers do overwhelm this pred squad, they can win if they just pick off teams one by one.

Since it's a BR game it's much more likely that the second scenario happens, thus creating our current problem.

So indeed, their system is flawed in some aspects.