Featured game modes:

Legend of the Poro King: New summoners that make everyone Lee Sin.

Hexakill: Puts six people on each team.

Ascension: You kill Xerath to get really buff, and you win by killing a lot of people or capping a lot of points.

Doom Bots: Really strong AI bots with about 400 passives.

One For All: Everyone is the same character (please imagine Veigar in One For All).

URF: Everything is buffed. Mana cost is removed. ARE YOU NOT AMUSED?

Black Market Brawlers: New lane minions and a few new items.

Do you understand what I'm getting at here? Black Market Brawlers is a very boring game mode. Compared to every other Featured game mode, it offers nearly nothing new. I honestly feel like the only thing I really enjoy about it is the thematic elements that it's the fight for Bilgewater after the death of GP, but even that is not a very strong link since it's held in SR. Most of the time, I think I'm playing normal SR. The only major difference in what you do is you counter-jungle more often. I would have preferred a mix-up of literally any of these with each other over this mode. The special lane minions, at most, will lower a support Soraka to half health and MAYBE execute some people. So no, I won't keep playing this game mode after I get the icon.