Jackolantern, congrats on your naturalisation!
I just wanted to add couple of things. First of all, do not expect to be treated better by the CBP because of your US citizenship. From my experience, the treatment by the CBP remained the same as compared to when I was an LPR. The treatment by the CBSA, however, became worse (more questions, unfriendliness, etc). Just to be fair, the CBP treats native-born US citizens in the same manner
Now, let's see what happens when you want to renew one document whilst retaining the other (your sole reason for applying at different times). If you want to use DS-82, you would have to send the other document anyway because that is how DS-82 works. If you want to use DS-11 to renew either passport card or book and retain the other document, there might be a problem. The DS-11 asks if you have ever been issued a passport book or card. The following are the choices if you selected "Yes":
- Submitting with application
- Lost
- Stolen
- In my possession (if expired)
So, as you can see, even when applying for a passport card/book using DS-11, the Dept of State wants you to submit all non-expired documents issued by them that are in your possession. There appear to be no way to keep passport card whilst renewing passport book (and vice versa) using DS-11 with just a naturalisation certificate.
I also agree that the procedure to replace a lost/stolen naturalisation certificate is ridiculous, especially comparing it to how easily native-born citizens can replace their lost birth certificates. Naturalisation certificate already looks like a cheap decorative piece of paper with sub-standard security features, yet it plays a very important role in all this bureaucratic machinery. It would be much better, in my opinion, if the USCIS and Department of State established a reliable and efficient cross-reference system, so that they would not need an original document to confirm the status. Would it not be nice if the USCIS did away with issuing a fancy certificate and instead give a piece of paper with printed naturalisation number that the Department of State then used to verify your status electronically? Nothing to lose, nothing to replace, not having to pay $$$ to the USCIS... just a number. Prove your identity with any ID document (driving licence, passport [card], etc) and provide your citizenship number to apply for a passport - easy and efficient. US passport [card] then can be used for any other government and private agency that cannot electronically verify the status.
By the way, this is the model that Canadian CIC has moved to. Now, they issue an A4-sized citizenship certificates that do not have a photo or any fancy security features. It cannot be used as an ID anywhere and is only used for the Passport Canada (agency issuing passports) to electronically retrieve the citizenship status from the CIC database. It still has to be physically send to Passport Canada though, and I am not sure what is the process to replace a lost/stolen certificate.