Yeah I've also thought the same, the whole atmosphere changed musically onstage when Shanks joined the live band,I've noticed when watching videos from the 2015 tour that the band still maintained a very raw rock sound the classics still musically sounded very hard rock. Shanks guitar playing during the classics comes off as sounding generic and 'pop' sounding, it's too clean sounding instead of the heavy guitar distortion tone which most of the hits and classics require.