Great, his healing was upped a little bit.
The actual reason why Slim isn’t considered viable has had no improvement and as such I see no reason to suddenly assume Slim is in a good spot right now.
Hard-focusing Slim cripples his healing output immensely and the Spore Clouds still offer practically no defense when he needs it.
I hate putting it like this, but an improved healing output means nothing to a Medic that spends 75% of the match either on the floor holding a pistol or spectating the match waiting for the dropship timer to end.
The only possible slightly positive nudge he might’ve received this patch is that he can perhaps achieve this healing output at a safer distance.
Ever since Slim’s Leech Gun accuracy turned dynamic, he’s been able to deliver a much lower, but safer healing output.
The thing is - if you want to be safe and do consistent healing, Val, Rogue Val, Caira and even EMET would’ve all been better picks.
Simply put, Slim was viable at his release because his playstyle involved being in the Monster’s face while having the tools to escape as well with good timing.
The latter has been crippled severely while the former is still the playstyle you’re supposed to adapt - which obviously gets you killed rather fast nowadays.