Complex sentence: Smaug would not have a "snub Simian (mouth) in order to achieve a dubious lip-synch", and del Toro stated that such attention is being given to him that he would be the first design begun and the last to be approved.
Split into simpler sentences: Smaug would not have a "snub Simian (mouth) in order to achieve a dubious lip-synch". Del Toro stated that Smaug would be the first character design begun and the last to be approved.