"League of Legends now apparently boasts a trio of absolutely astonishing metrics. Riot reports that 27 million people play the game daily, while concurrent players peak at 7.5M. In total, 67 million players play the game every month. All of these are enormous jumps from the already huge numbers from over a year ago.Jan 27, 2014"
But hey, that was 2 years ago. Even if you account for players that quit and NOT new players, that'd still be in double digit millions. Even if you just went off the 2015 Worlds Champion viewers 14 million), your 20,000 count is chump change.
This all still boils down to dislikes of something are spoken more than liked things. People that don't care that solo isn't returning aren't posting repeat threads everywhere. So really if you were to just go by your 20k, hell we'll give you 50k that are against this vs the 14+ million that are fine with this then Riot made the right choice.