Shyvanna I think is the main offender of the Smite toplane annoyance. She can get away with it as she is hard to lockdown with her burnout and can ult away in a pinch. I like that people are using new strategies in the game. The smite/teleport top laners are limited to decreased mobility with increased combat stats. The same thing happens with Hecarim when he goes ingite/tele. The thing they have in common is the insane movement speed and ult to escape ganks and stay safe. The balance team is taking steps in the right direction with the recent nerfs to Cinderhulk. It was really strong on launch but it is going to find a healthier spot. I suspect the item might get nerfed again, but champions that benefit from it a little too much will probably get nerfed as well (looking at you Sej). The idea that there shouldn't be a jungle item with stat multipliers seems to me like just a complaint of facing top tanks who run smite. If you want a real problem, imagine an item that you didn't need to run smite to get that HP bonus. With it being a jungle item, it forces top lane tanks to make a choice. Do they really want that bonus health or do they want more options with their summoners.
Honestly, if there was a jungle item that benefited midlaners more, I think it would be more problematic than Cinderhulk. You don't see many midlaners running Teleport as a summoner so if they could run Skirmishers or Stalkers and swap out their Ignite, they still have Flash to make plays or escape ganks and they have an offensive summoner in Smite. I don't think ADC's would swap out their defensive summoner(Heal/Barrier/Cleanse) at higher tiers due to how important they are. The thing with tank toplaners is that in this meta, they are expected to run Teleport to support their team, so they are forced to swap out their mobility summoner for Smite. This limits the possible champions who can run Smite/Tele safely. Low mobility tanks cannot hope to build Cinderhulk in toplane as they would be shut down too hard.
I dunno. These are just my thoughts on the matter. I know a lot of people are currently upset with the tank meta we are in right now, but everyone was upset about Lee Sin, Vi, Jarvan, and Rek'sai being the only viable junglers a few weeks/months ago. The only reason tank junglers are at a higher viability is because of the new jungle item. It gives help with clear and allows them to scale better in the lategame, the tradeoff is early game pressure that they cannot provide.
If the item remains OP, they just need to tone it down a little bit. The interesting thing about the item is that it's a scaling item; it isn't initially powerful but becomes stronger later in the game. It's similar to Devourer in that sense, and I think that it's appropriate for the Jungle Tank item to have scaling potential. Upon release, it gave way too much HP as a first buy (350 base + 25% = ~440 HP) from an item that is supposed to scale. I think it will eventually go down to 250HP (Bami's Cinder would cost 800-850) and keep the 25% or it will stay at 300 base and the scaling will go down to 20% and then it will be more balanced.
As a reiteration, I don't have a problem with Smite toplaners. They made the choice to do without the added mobility of Flash. It's a strategy choice. If they want to sacrifice that safety for more objective control and more offensive laning, players are free to do that.