I get that you really like the game, so I feel it's only fair to help shed some light on something you likely won't hear anywhere else (unless you go bugging V-Singular on the official forums)
IMO, in terms of the raw resources required to get a game built and out the door, (and Kakesu can chime in if he feels otherwise) SRTT most closely parallels SR1. It's a new engine with all the stuff that comes with wrestling with new technology in a single game cycle. SR2 used the exact same engine and more than less built off the version of Stilwater from SR1.
That in super boiled down terms means that the city of SR2 had about 6 years of development in it.
Without going into too much detail, our cinematics manpower on SRTT was much less than it was on SR2 or SR1. I could go into numbers and I would probably be wrong, but my gut estimate is that we had anywhere from 50-75% fewer cinematics artists on SRTT.
I'm going to leave it as an exercise to the reader to compare exact headcounts between SR2 and SR3, but it's safe to say we did more with less. Because we had to.