So if Tahm can't eat buffs because it would make counterjungling too easy

Then please explain why {{champion:20}} is allowed to have consume and {{champion:134}} who doesn't even jungle in the first place is allowed to use her W on buffs. Also, if you are really that worried about it lacking counterplay, another thing you could do is making Tahm treat buffs like champions so that he not only has to apply 3 passive stacks before he can swallow them but also is slowed down while they're in his belly.
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