Speaking as a solo-queue-QP-healer (Mercy) main, my observation is this…
There were/are more people in OW wanting to play DPS than tank or support.
Blizzard responded by creating tank and support characters that had a strong DPS aspect to their game-play in an attempt to draw some DPS into those rolls.
The DPS players found these new tanks and supports could be played almost solely as DPS characters and did so in many instances, which brought about a brand new set of problems.
222 came about in an attempt to fix the above issues and try to enforce some form of stability into group formations, but did so at the cost of long DPS queue times, because the player base’s desire to play DPS, and DPS only, never changed. (example. my queue time as support is 30 seconds to 2 minutes on average in QP. DPS are not even remotely so “lucky”.)
132 was tried in an attempt to fix 222’s DPS queue problem, but came with a whole new set of issues (example: 1 player had the power to throw the whole match, with no ability for anyone else on the team to compensate).
No joy.
Blizzard has a hard choice to make if they want their game to survive.
Either allow people to play what they desire, no matter how crazy the team-comps are (to bring the queue times down). Upsetting those that hated healing 1-5 teams (I loved it (healing it solo) BTW…always interesting, with some outrageously fun unexpected games).
Or tune up the DPS portion of their game, toning down the tanking and healing aspects so those abilities are spread around the roster more, instead of more focused into supports. (Not my kind of thing, but I could see how the DPS side of things might dig it.)
OR make tanks and supports more interesting to play to those DPS. Not by adding DPS to them, but by giving them “strong” abilities that can’t be had in the DPS category, that are as involving to play as DPS. (sorry so vague here, game design isn’t in my wheelhouse.)
OR replace ROLL-QUEUE with GAME-QUEUE and have the entire game be like an arcade, where all modes are treated equally (It’s almost there now, but the focus is mainly on COMP and QP, with everything else being a sideshow. I’m talking about removing the separation completely between all the modes, removing the rotations, allowing time played to be accrued in all modes, achievements to be had, Stats to be collected, etc etc.) Then people can play what they want, how they want, DPS or otherwise. (The player base might get spread too thin, but the queue times would more reflect the popularity of that game mode, over the popularity of the role. If you had to wait a while for say “Total Mayhem” (LOVE that mode) then you’d at least know why and feel better about it.)
Right now OW is in some odd limbo land, where none of their main modes feel correct, and they keep tripping up trying to “fix” them.