I still think the crew compliment was not that large. Otherwise, it would not have been difficult for Riker to re-arrange the ship to four duty shifts, there would have been sufficient personnel for each post.
Um, what? This only makes sense if you assume that a large number of that crew is just waiting around for something to do. Otherwise, the larger the shift crew needed, the more work it's going to take to try and work in an additional shift full of workers without taking on more crew.
It was actually pretty stupid for Jellico to just willy-nilly order Riker to make a change like this. Assuming the ship was staffed for 3 shifts, where was the additional manpower supposed to come from for that fourth shift?