AA definitely has some issues, but lets give Kharitonov some credit here. He had a really good gameplan. He had obviously decided that he could afford to take 2-3 punches to give one, and he would get to AA eventually, and it worked perfectly. He planned to walk right through him and he did, it was well done by him, it was just the right way to fight AA.
AA is obviously no longer capable of hanging with upper level fighters, physically or mentally. He is just too chinney, and can't adjust his game to protect his weak chin.