I'm a Champ and chose to play in the rookie bracket of the current showdown. Not by much choice, didn't have enough coin or credits to partake in the higher brackets.
Funny thing though, 1st and 2nd place are currently held by Tour Masters and 3rd place is a Legend.
Since I'm returning to the game after almost a year break, it's hard compete with the lower tiers with their higher apparel upgrades since they've played the new version of WGT more than I have.
Before my break from WGT I played the rookie bracket simply due to the prizes. The ball prize mainly as at the time it was the ball I played. Didn't want to win balls I didn't plan on restocking and having to relearn.