Yes you have a good chance of another cabin clearing. No one can give you odds but I think you will clear.

You may increase your odds if you are willing to take a guarantee (no cabin assigned but you are assured that cabin or better). The problem with that is you may end up aft as you are now, just in a higher category.

Although things are always changing the normal rules are priority in this order.

1. Those already booked wanting to change cabins
2. Waitlists that are deposited.
3. Waitlists without money deposited.