Micheal Heisley was never upset over the attendance figures to be honest. Hell, attendance would've been high in Vancouver had it not been for a shit team in the six years they were there. There was never any sign of improvement on the court or in the front office. Hell, look what happened to basketball in Toronto during the dismal years.
The attendance in Memphis is brutal and even when they were at their peak, interest in the team remained minimal. Really, alot of this falls on Heisley and his poor business practices and just well, a jerk off.