Actually, it is really that bad at all.
During my training classes and, more importantly, based upon feedback from the customer, I have learned the following:
1) The CUSTOMER wants to see a difference between the pre-launch and production control plans ---> specifically, more frequent inspections at the standard points of inspection, and, as applicable, more areas inspected. (Depending upon your business, there may be different processes and the like...)
2) The understanding is, once the "bugs" have been worked out of the process, the production control plan MAY show scaled back inspections (less frequency or smaller samples), or the elimination of non-value added processes, inspections, etc.
That is a basic starting point. The philosophy being that, during the "pre-launch" phase, you are doing more checking, more scrutiny, and perhaps trying different things. At the "production" phase, you have the core process pretty much honed to where the above mentioned items MAY be reduced, changed, and/or new implementation for production.
ALM