Of these points listed, the only one really fixed was Innervate in the latest patch removing its dispel resistance from Improved Barkskin and reducing the amount restored and cooldown by 50%. The rest of the issues remain outstanding and I would really suggest the following changes if Blizzard wants to keep people playing actively in s7:

Start teams at 1500 rating. Please. The grind from 0 to 1500 is brutal especially if you start right off the bat queuing at 2800+ MMR against the top teams in the battlegroup. And if said top teams are not queuing, you get to enjoy 5-8 minute long queues (pre-patch) which are significantly longer after patch 3.2 with the new queueing system about WoW Account.

Change it so at least the MMRs are sum-zero based if not the team ratings themselves. I honestly much prefer the original TBC rating system where any points gained were identical to the points lost by the other team. Ever since this changed mid-season 5, arena has honestly just felt so much less gratifying to participate in knowing that teams can generally just spam games to high ratings about WoW Account.

Address the ridiculous arena specs such as prot/holy for paladins and the "FoK" spec for rogues which should never be even close to viable. I have said it before and I will say it again: PvE tanking paladins do not even get improved hammer of justice and the only reason they get Judgements of the Just is the attack speed decrease. They do not need 20sec cooldown ranged, magical kidney shots.

Most of the big burst classes were addressed so they could not "global" people anymore including death knights of all specs, rogues of all specs, retribution paladins, and even hunters a while ago. However, there still remains the problem of destruction warlocks about WoW Account.