I am not an expert and not qualified to give personal advice . . . that said, actually the IRCC website still has the 10-2016 version of the application form, so no changes actually made as yet. So as long as you followed the instructions, are qualified, honestly and completely filled out the application and submitted other documentation as instructed, all should go well.
It warrants noting, though, that generally once an application is sent off, there is not much if anything the applicant can do until the application has been formally opened and either put into process or put in a queue to return as incomplete. Practically this means that once it is mailed, wait for the AOR to do anything unless IRCC contacts you otherwise. If an inordinate amount of time has passed, well beyond the time line in which others report getting AOR (for applications made around the same period of time), then it would be time to call the IRCC help line with a query about the status of the application.