Why The LCS/LCK/Worlds only sees ~45 champions
Because the game isn't balanced solely around the Pros, unlike dota2.
The game wasn't balanced for the pros, that's why LCS has so many little picks. One dimensional champs like yi and trynd work okay in casual play but they offer nothing when you can coordinate correctly to shut their asses. If riot decided to completely ignore casual and high elo play and solely balance around the top players, then the results would most likely be similar to Dota2.
[sated devourer]
