Watching the season 3 worlds video made me realize how diverse the game used to be.
https://www.youtube.com/watch?v=PX_IQkeXq9g
Every pro on here is represented by their signature pick. In the video we see Kha'Zix, Zac, Gragas, Lux, Blitzcrank, Malphite, Kennen, Jarvan, Vayen, Ezreal, Janna, Jayce, Ryze, TF, and even Mordekaiser. In the intro thumb, we see Caitlyn/Thresh vs. Ezreal/Annie. And this was back in the Zed vs. Kassadin or Talon (when Kassadin was banned) assassin meta that was decried for "lack of diversity". If only they had known what would follow...
Right now what are the pro signature picks? Only meta stuff. Every pro is picking the same stuff, and the difference between meta champs and non-meta champs have never been bigger. Even in season 3, the biggest difference in win rates between champs was only 6%: 47% with urgot at the lowest, 53% with Amumu as the highest - even permabanned Kassadin only had a 52% win rate. And it was expected that a safe teamfighting tank would have the highest win rate, since it is a centerpiece of many comps. 47% Urgot was considered horrible back then and in need of major buffs. Back then, the top tier champions would only have the highest win rate in a single role, and same with the worst champions.
Now? The gap has gotten even BIGGER in plat+: there are 22, yes 22 champion/roles with a higher than 53% win rate, and a whopping 50 champion/roles below 48% win rate. http://champion.gg/statistics/#?sortBy=general.winPercent&order=descend
If you go by raw champion stats, the gap is still huge: 56% win rate on Kog, 41% win rate on Nidalee, 22 champions below a 46% win rate.
http://www.lolking.net/champions
The game is less diverse than season 3 despite more champions; the difference between top tier and low tier champions is bigger than season 3 despite measures for "diversity" and snowballing (winning a game off initial advantages) is even worse despite season 3 being considered a "snowball" meta with very punishing setbacks for losing lane.
in your list? nerfed for solo queue low elo to be garbage right now unless you get a smurf to play in plat
being played in pro
was even played by alex ich