the bamis cinder and cinderhulk changes overtuned tank junglers
Looking at multiple stat metrics shows it as a fact outside of seeing it from the point of view of personally playing matching or watching streams.
The bami's change improved their clear speed across the board, which was the first problem caused with the tank junglers that were already the pack alpha's of the junglers. Making cinderhulk cheaper was the overkill point, allowing these champs who again were already generally the strongest group of the meta the patch before, let them powerspike earliest of any of the other jungler types. Even if the items are tuned down a little, tank junglers as a group are in a generally overtuned state that requires definite tuning down for the kits of most of them.
On that similar note bloodrazor junglers who should generally be the natural counters to the tank junglers are all doing comparatively lackluster. Where this item is something that can use some very distinct heavy retuning more than the champ themselves do currently.