The proposed changes to be blunt do not address the problem, they read like tweaks playing around the margins and look as though they still don't really accept that Arena is fundamentally broken.
The real issue is this -
Classic Arena is required player progression as PvE competence is locked behind it (Great Hall, Tier Bonuses, 2 Champions)
Plarium wants it to be a competitive system rather than a progression system, yet reward it as a progression system.
Pick one. Competitive or Progression. Take the other elements out and put them elsewhere.
I'm sure the argument would be "Ah but no one would play Arena if there were no rewards for doing so". Blind to the fact that no one really wants to play it as things stand.