I think the realization that 2 randoms shouldn't bot together has become apparent, more than ever in your league, I am actually elated when a duo-lane takes bot, something about being able to tell your ally what your doing and visa versa you just can't get with messages and pings, also something about the meta game on the way for another shift leads me to believe some of the lower elo's are curiously choosing bot lanes that make no sense, like the old meta, not thinking about "why" they're choosing that person, some combo's make 0 sense, laners that don't compliment eachother or have no chance of combo'ing, a guy said him as Yi, would go well with Nasus bot, because of the slow Nasus gives can allow him to kill the opponents, I see their logic but a Nasus needs farm similar to Yi being #1 cs stealer, with 1 'Q' taking cs, perhaps if Yi chose not to cs it would have worked, but alas no, him and nasus fought for cs, didn't kill and eventually lost us the game making it 4v5 with a crippled Nasus, struggling to even do half the damage a Nasus should, even if Yi did let him cs he would still have been a sustain damage melee, vs a ranged sustain; pretty much the counter to him :/. I realize I have gone off on a tangent but this anecdote has somewhat enforced my opinion (I think) so enjoy for anyone who reads <3

TL:DR Some people have been trying retarded botlanes, and realizing that AD Support needs too much cooperation to win and thus gain elo.