Both Back Lot Tour and the car stunt show were past their prime (IMO). The Streets of America were sorta neat, but not really an attraction (Hey, Mom! Can we go back to Disney to see the fake city streets!!!). I can see the disappointment in losing the HIStK playground and am a bit surprised a new, similar playground wasn't put into the new TSL. But other than that, the two fading attractions are being replaced by four new ones, two of them E-Tickets. Also, a lot of true back lot space was taken over to expand the footprint of the park as a whole (R.I.P. Earful Tower). The SW Resort will also sort of officially expand the footprint of the park.
And if this all goes well... it will be the incentive to raze more of the back lot to make DHS a true hub park.