FST draw is on one side and there are good enough of ITA target pending for the year.
So 99.5% you really don't need to worry.. the wait period might be one or two months here and there give or take, but 457 is a decent score and you'll get the ITA.
If your in a hurry and don't mind reattempting the computer IELTS go for it, CLB 7 to CLB9 will give you a boost of 4 CRS points (spouse) and CLB 8 to CLB 9 will give you a boost of 2 CRS points ( spouse).
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