PVP has been gradually going down the shitter since they introduced that rated crap. What the majority of the players want to do, is join solo and enjoy PVP without the need of sitting behind the PC with a headset. I've seen statistics that mentioned that even during arenas primetime not even 1/10th of the whole PVP community played rated.
And yet they decided to focus and balance everything around arena! And that's where the problem lies.
You cannot balance a game on 3vs3 and expect it to be working in 1vs1, 10vs10, 15vs15. This just doesn't work. Balancing a game around 3vs3 it exponentially harder than balancing around 1vs1.
Every esports game I know is balanced around 1vs1, because if 1vs1 is balanced, 3vs3, 2vs2, 5vs5 etc. are automatically also pretty much balanced while the opposite thing definitely isn't true. Look at blade & soul for example .That's what I call esports. That doesn't mean that every of the 10 classes must be present by 10% in the ladder! Some classes are still harder to play than others, but at least every class has the potential to get ranked 1.