Usually when CIC has some concerns regarding your application, or there is something they want to review again, they send the application to IRCC Etobicoke office.
If you applied with a spouse or you are getting sponsored, then they might have concerns regarding the relationship between you two, and they want to see if there is an actual evidence of it. Also, if you are a refugee, it's normal to have your application processed in Etobicoke.
If none of these scenarios applies to you, then having your application processed at IRCC Etobicoke means that there is a big chance that you later on will be invited for an interview - sometimes they randomly pick up applicants and ask them a few verification questions, and if there are no red flags, they grant you a PR on spot.
If you have nothing to hide, then I wouldnt worry about it