My friend got to high gold literally playing nothing but Azir bot lane. It would open his teammater to play stuff like Zed mid, or maybe play a less favorable adc at the time like Vayne top. This season he's playing LeBlanc and Orianna bot along with the Azir and hes already Plat 5.
So idk. I don't think these things are meta or even good imo but it opens some interesting team comps. The problem with trying stuff int he bot lane like that according to him is even as you climb people tend to rage at things that are unconventional cause ya know, ranked.
I personally really like playing Lucian in a solo lane and I've tried spicy stuff in the bot lane in normals, but unless there was a champion built to do it I'd never take an AP bot lane.
TBH though I'm happy with the meta. Besides needing better tank killing options for non ADCs I think we're not in a bad spot. shrugs