PvP is currently in a death spiral. Unless Blizzard take immediate action it will only get worse:
Blizzard created Solo Shuffle, this effectively killed 2v2 and 3v3. Solo Shuffle is now the de facto WoW PvP mode.
Then the death spiral started:
There are significantly more DPS players than healers. This means that in Solo shuffle DPS players have to wait. Given that the vast majority of the playerbase plays DPS, this means that most people are negatively affected by this and will spend a lot of time just waiting for the game to pop.
What happens next? Well because more people play DPS, it is easier to rank as a DPS player, because the DPS pool is much larger.
Well this leads to even more DPS players. Why struggle as a healer? When you can reroll a Retri Paladin and get higher mmr?
What has Blizzard done to fight this? Well healers get faster conquest boxes, this has the negative unintended effect that healers actually have to play less to fill their weekly vault. Or do less solo shuffle if you are just casually looking to gear through conquest solo shuffle. This means healers play even less.
We are now stuck in a situation where the waiting time for DPS players are very long. Don´t worry though!! Things are only going to get worse. Because as a DPS player waiting for over 45 min for a game, once the game starts you want your bang for your buck. So if you feel like the healer is ´´screwing´´ you over, there is a chance that you will behave extremely toxic towards said healer.
What is a consequence of all this toxicity? Well even more healers leave. What does this lead to? You guessed it!! Even longer waiting times for DPS, yaaaaay!!!
Of course all these things constantly compound and feed off each other and WoW PvP is now basically in a death spiral. 2v2 and 3v3 are in such a horrid state that no one is going to bother switching to that deflated mess and things are only going to get worse for Solo Shuffle.
Note, this is not some judgement on Solo Shuffle. PvP in WoW however is a complete mess, and Blizzard giving Solo Shuffle healers a mark of honor or whatever terrible ideas that their interns come up with ain´t going to fix this mess.