Preventive measures, believe it or not the devs have a better grasp the direction the game is going in than people think, and many times they implement preventive measures to try and stop a certain meta from forming, of course they have times they mess up or didnt make preventive measures that are good enough, but you can see that they try them often, I see this torb nerf as one of them, they seem him as a potential threat in an upcoming meta they do not like the look of and are nerfing the thing they believe will make him a problem before this happens
… What? You mean his ultimate being changed? The 50 hp nerf? Or the change to how the cooldown works?, not to mention how it got to buffs in the process being able to be placed in more places than before, not needing to level it up, and being able to heal it faster with overload if needed (yes overload increases hammer swing speed meaning increased healing on turret) so the turret got 3 “nerfs” and 3 “buffs” balancing out things pretty well, and torb also got another area denial ult that works in an aoe and can cover more ground than his level 3 turret could, I’d say overall his area denial is better after the rework than before, not to mention his own dps buff to his shotgun and the projectile speed buffs to his attacks making himself a higher dps higher accuracy attacker than before again increasing his area denial, I dont see how he’s any worse than before
Maybe they just dont want him to be as good at it as he was, Mercy’s still a good single target healer, they just didnt want her to be as good as she was so they nerfed the healing
To make him more viable in more situations which it did