If you place high in swb regularly you can possibly get 30-60 adv. refines per week. If you enjoy the slow grind and don't mind missing on wanted/nine tails/ti/dailies/sweeping instances then sure (you will miss on 75 coupons, 7 adv. refines, 21 myobokus, main char frags, coins and some power from TI/wanted). Keep in mind what Shadoblaze said though. People quit the game and it's possible that with time your bracket will get merged with higher lvl brackets...
EDIT
Actually, you will miss a bit more power, because you will be unable to fully claim free rewards from events such as fishing mania, time-limited recruitment, great plates etc.
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