The devs actually do this and apparently had openly admitted to knowing Brig was OP upon release, but sent her through that way to force a meta change.
They did the same with Mercy by releasing her rework the way they did.
It’s intentional to shake things up, then they slowly try to correct it, which just end in them nerfing every hero that was even involved in that meta instead of doing it right the first time.
They try to nerf and buff certain heroes to try to force their pick rates to go up and others to go down to meta shift.