DPS checks are what make damage dealing jobs relevant. If you didn't have checks, you'd run an all tank/healer comp and hammer away at fights for hours just dodging mechanics until you cleared. That's also why there's been a push to differentiate tank/healer dps from pure damage dealer dps this expansion.

That's not to say that the design of fights from a tanking/healing perspective is without problems, however. Auto-positioning bosses are anathema to good tank design. A7S was probably the last well designed fight from a tank perspective. They really need to review how they design their fights. The formula is kind of stale.