From my understanding the rift crab is much more important to get than the randomized dragon. And the point of having 2 bot before was so securing that objective was easier. So why has the meta not changed yet?
Rift herald is a one time thing and normally Top, Mid and Jungle are involved to take this so there is no need for a duo top lane. Dragons spawn every 5 minutes after the first one has been killed, so it's better to have 2 other players other than the jungler always being present.
It mainly comes down to fortification being on top and mid turret and not on bot outer turret. The bot turret goes down much faster early on.
i just think there shouldnt be a jungler anywhere below Diamond. 2 top 1 mid 2 bot.
Play Leona/naut/Taric/alistar top with smite/mobis/and relic shield as the core build.
