From: yamas11 | #007How would it be unbalanced?
Take supports and AP mids for example. To be a support you need utility, to be an AP mid you need damage and some scaling. You had some supports like Janna able to do both, so they nerfed her damage. A lot of damage and a lot of utility is imbalanced.
Though a lot of top laners can jungle well, and now many of those top lane/jungle bruisers are also being brought mid so we have quite a few champs that can do multiple roles, though not all.
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