crewbunk,
i dont think there is any thing that might delay PR delivery other than photos but my advice send photos for all because i got photo retake request for me only via email then 10 days later i got via courier mail photo retake for other family members. by the way you can go and link all other dependent applicants to your address and email address or just call ircc on 1-888-242-2100 ivr options 2320 you will talk to an agent. make sure to ask them about all family members and update your mailing address and email address, they might ask you for some verification information like UCI and full names, DOB etc..
thank you very much for your advice. may I know does the number 1-888-242-2100 can be dialed if I am outside Canada?