Once a class hits rock bottom, all you can do is go up from there. 1st step they should take is revert all the nerfs, then add more buffs. The nerfs were never justified, including the accuracy 3% nerf, rocketpunch knockback, jetboost cooldown increase, and crit talent nerf by 3%, adding heat cost to kolto shell, nerfing supercharged gass, and others. All the changes need to just be un-nerfed, the class was bad back then and is just broken now.
That would require BW to admit they were wrong. I'm sure some of them, deep down, know it - but to admit it is something else. They'll just keep riding the failtrain of their own hubris until it crashes.