You're missing the point. The oversight process in this bill permits spying to take place for thirty days to four months before being forced to stop. The govt can spy for thirty days (plus the 1 week before submission of certification) even if judicial oversight rejects their case the moment it is presented.
The timeline assuming the agency's goal is maximizing the spying time:
0 day - spying begins without any preamble
1 week - Gov must submit certification for review
1-30 days + 1 week - judge must returns review
if judge objects
30 days after review- the govt must stop spying
unless they appeal to FISA
then they could have another 30 days
If the judges and courts have full queues that could push the whole thing to four months.
Assuming it gets rejected they presumably (IANAL) cannot use the evidence in court. Nonetheless they were legally empowered to look through your internet/telephone underwear drawer for over a month. How are you feeling about your 4th amendment rights now?
The article goes on to describe how the constraints make this law very easily abused to include spying upon americans for a wide variety of pretexts. That is the other half of the problem.
This is a terrible law even if you ignore autocracy being implemented by the telecom amnesty provisions.