The common Top lane Picks are just obvious now...

Riot managed to Buff Riven. Even though, she was already in a perfect spot of getting pentas in late game. with her Vitals of % true damage, there is no enemy tank against her. It's a game between squishies against Fiora, let's 1 shot them too! With his previous rework on PBE, given a % health shield, more damage on spin. A whole true damage ultimate. There you won't be able to counter this guy honestly, he can do anything to win any duel in seconds, no matter how you build him. with her sustain and high amount of flat true damage, + shield. Make sure to add her high distance dash with a knock off on targets, there both tanks and squishies will have problems with her. Extreme sustain + 3 knock offs + slow + immune to death after a kill. Again, Both tanks and squishies won't want to deal with him. She is a great carry, can snowball from mid game against all lanes by roaming around. She can dash, tank, CC the targets and auto hitting them to death so fast. Lane bully, huge DPS and teamfighting tactics Can counter most champions in game with his counter shield, and has a perfect range to kill from range with his spear. + a Stun as well He is almost immune to duels, he can be the master against any target

As for the other secondary great top laners, you have:

Can be the tankest guy in game late game. However, he can reforge his allies' items, he is both supportive and massive tank for the teams. Let's not forget his tank melting ability. Can stack his HP ultimately, but again... Tanks are not enjoying the game now with all of the % damage against them. Nontheslss, I mentioned Chogath mostly because of his ultimate's damage on 1 target, he can completetly delete the target with just flash ult, if he has the amount of HP for it it from items and stacking.

Asking why these guys are banned so many times in Rank? It's obvious! The other Top laners are lacking so my suggest is, either buff all the other top laners as well, or keep things fair in the game.