Burnout generally follows a lack of control. Changing work hour rules, if anything, worsens lack of control.
The ACGME rules are not helping residents. They are not improving patient safety. They are likely impacting education.
Work hour rules, however, are accomplishing one of their most important goals–giving the public the impression that the ACGME is doing something to keep sleep-deprived residents from harming patients.
As long as they continue to accomplish this goal, I see very little changing.