I think it helps. It increases amount of viable brawlers, because without the shield, it's just a dps race, which Colt and Bull will win depending on your playstyle. With the shield, PVP is increased, which increases the viability of other brawlers in the game.
@Ahegoface96 Have you seriously not played? Each mode will give you a Star Token each day when you win, 10 Star Tokens = 1 Big Box (1 Big Box = 3 Brawl Boxes). After doing some math, that means winning just one Takedown match gives you half a box. (1/10 of the big box *3 to convert to regular boxes, then plus 20 tokens from winning = 50%). Just playing once for the free reward is definitely worth it.