That's because the TNG sets were supposed to be used in a show during the 80's called "Star Trek Phase II" which would star most of the original cast and crew except with a new vulcan and some ugly arsed helmsman. That series was cancled and the set was left waiting while they shot ST The Motion Picture and the rest of the movie series, during the late 80's they decided it was time for another Trek and used the uniforms and Written scripts of "Phase II" and placed the TNG crew in the roles instead. And if the first set's and episodes are any hint as to what "Phase II" was gonna be let's be glad they cancled it before it was launched
As to BSG Yeah I do like the fact that they keep a running talley of how many people are left, I mean Voyager they had a crew of 150 roughly plus 20 Maqui, they apparently lost about 30-40 during the first few seasons where they took some pretty heavy beatings by the Kazon, later they got pLastered by the Borg which should have killed more yet didn't?
Anyway I like the new BSG because of the fact that they have very "modern" sets and nothing overly futuristic where it would just be pathetic

AND THANK YOU The Galactica is a warship NOT A PLEASURE CRUISER it has tight corridors and no frills, what was up with Star Trek and giving everyone wide open spaces and frills? Maybe that is why when their shields go down they explode, no room for armor with all those perks LOL.