providing cinderhulk with 10% cdr would help quite a bit as well, as it would provide a viable alternative for fighters that would prefer more beefiness over damage early game.
I'd definitely say this doesn't seem like a bad idea since it feels like Runic Echo's and ADC junglers are pretty prevalent right now. This would help give both fighters and tanks a shove in the right direction IMO. Alternatively you could just buff the %HP on the item back up to 20%, dropping from 25% to 15% seemed like just a little much.
I'd also say Warrior could probably use some looking at. It needs to be made more appealing for bruiser junglers without buffing up Graves or Kindred. I'd say that something like -10 to 20 AD and a melee only unique passive similar to the old Lizard Elder passive would give it a solid push towards being more of a bruiser item and less of an item for ADCs.