Is this a new meme? ''Ahri is OP!'' People hop in the bandwagon and just because she sees plays in LCS everyone cries about her being OP.
IMO she has well rounded strong kit. She doesn't have any sort of oppressive mechanics. She should be an example for future reworks and balance changes. She's got damage, but not too much to the point that she can one-shot people without getting fed beforehand, she has utility, is really fun to play (although i didn't play her once in the past two years.)
In short, her kit's got a bit of everything, so even if she's on the strong side, she doesn't break the game in any way with cancer mechanics.