Some adjustments for the battle royale mode:
-Remove all items(pets too) except for vanity
-When you enter the match you get auto gear and weapon every match based on your ranking.
-Make the map a little bit larger
-From 1000 to 10 000 Gold reward when you win.
-People matching the same Tier match with each other.
-Make achievements for winning multiple battle royale matches.
-Make a leaderboard: Top 50 battle royale players, if you end up top 10 you get a Badge or a Title and maybe an untradeable vanity.