His Bangkok and Pity The Child are not his best vocal performances, and are likely bolstered by the live atmosphere and acoustics.
Having seen it 12 times, 11 with Aaron, he was finding his voice in the beginning, but it felt like he never truly got there. Later trips saw him leaning on the ensemble blending in Bangkok and opting down for many notes in Pity The Child, usually trying to save himself for one big note at the end.
While Bangkok can usually be skated on by someone who is good with rap/patter style, Pity The Child is purely rock, and Aaron is not. My friend and I each saw different understudies the last time we went - I saw Adam Halpin, he saw Aleks Pevec, and both of us said our respective understudy beat Aaron vocally.
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