I have learned a few time saving tips over the years that help speed up repotting. Very shortly I will have to repot, divide, and pot up to the next size 400+ sarracenia. The first tip is like a few others have said, only modified, is if all you are doing is potting up say 3" pots to 6" for example, fill the larger pot with medium of choice and fill around an empty pot of the same sized pot thereby leaving a void exactly the size you need. Then it's simply a matter of overturning and placing the potbound plant into its new home.
The second tip that may extend the length of time it takes before you need to repot Sarracenia deals with species that have strong central leading points, ie. alata, leuco, flava etc. is instead of centering the rhizome exactly in the middle of the pot, place the oldest part, that is the part not actively growing, against the wall of the pot. This will allow the plant to grow into the center of the pot and greatly reduce the frequency or necessity of repotting due to the growth point(s) reaching the pot walls. This won't speed up the repotting process per se, but like I said may reduce the frequency in which you need to repot.
Hope this helps!