artists used same leg layouts for first and fouth, second and third... come on, guys. Haruhi and adult mikuru's lower half look pretty good, but nagato and young Mikuru probably wouln't have their legs the same way (let alone the same panties pulled down the same way...)
Not only the legs! It looks like the torso is the same for Haruhi and older Mikuru and for Mikuru and Yuki. Which is pretty stupid since the two Mikuru should have bigger breasts :|