your question on final decision is very uncertain to answer. As we can see, at present FSW-O from USA are fast moving applicants and moreover this is summer season in Canada which may also be reason for delay in decision. As you're in IP2 I hope you will get to hear final decision soon.
Coming to chance of rejecting, most of the times this happens during the stage of Eligibility for mismatching of NOC job duties with job duties in your LoR.
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