You know what would be a good idea for a next champ?
AP carry bot lane. All the perks of an adc except ap. I'm always frustrated why the all the other roles need to adjust according to the team but adc always gets away with being an adc. I hate an all ad comp just like anyone else but there's a lot more possibilities if they explore and apc on bot lane. Not in the vein of Morde but in the vein of traditional ad carries. Corki comes close but the way his damage is divided into two kinda still means you need an ap on your team.
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Other than that, there's an overabundance of ad champ in the top lane and overabundance of ap champs in the mid lane. AD mids is basically compromised of ad assassins and nothing else while AP tops is mostly just ap tanks. Where's the ad Viktor? Where's the ap Riven? I think Riot should explore more options and add more diversity in lanes. The meta needs to shift on Season 7 anyway so just make it more exciting.