If this is what they're going with she better a.) have defined biceps and b.) have the tattoos.
If I had to choose a season 2 look, this would be it, this one is preferable to the enforcer outfit or the oilslick outfit, but it's stupid to go with any of the season 2 looks when they all last mostly a single episode. (The season 1 outfit even has more screentime in season 2 than this outfit, I think).
I suspect they're going to make the finale Jinx, too, because Jinx is the money maker and Riot is definitely pushing that look in the merch, and that probably played a factor in this decision.