Eh, maybe. Singed usually fluctuates with the meta, but sure. I guess if it will make people stop asking for a gutting, I'll take it. He can basically still do everything he does right now, just with a little less bad stuff.
Also, it seems weird if you attach it to his R. Just having a passive that doesn't scale with rank on an ultimate is just... strange.
If we are changing Singed, I would also like to request that his Passive just allow him to ignore unit collision as well. As a character who primarily farms with his Q, it's annoying to sometimes just start going around in circles in a minion wave due to minion collision.