before it's too late
I think they just need to buff other controllers
Some ideas:
Give brim rechargeable smokes, and replace the stim pack with something that either gains intel or flashes
Omen: make smokes place instantly, allow the ability to place 2 smokes at once, increase the radius of the flash, and increase the distance you can tp
Edit: maybe also make the omen flashes rechargeable, and not nearsight teammates
Problem is I don't think they will ever buff brimstone/omen again if they don't nerf Astra before. If you think about it, Astra is getting pretty irritating already. She has too much utility. If they nerf her enough, we would get to a previous state of the game where omen/brimstone were viable.
Omen/brimstone just need Astra nerfed to be viable again as smokes are still needed.
Brim would be more prevalent on maps like Bind, Haven or Fracture, and Omen utility would be on par with Astra's one