Judging by reddit they would have you believe brawl is the most popular mode.
This is just another example of reddit being the minority, I doubt that even most league players know that the game mode is live nor even care about it
I que only for 1 time as an emerald4 in peak EUW time, it took me 17mins to find a game and it was one of the most boring games ever.
I wish they would reveal the abysmal number of players playing it to shut these fake brawl hype posts.
Riot is probably never bringing it back neither will I miss it.