Law and Order.
Excluding law and order from a DCO,s jurisdiction andplacing it at the disposal of nazim has served to cripple these deptts.It was seen during crisis in Dera Bugti and Kohlu distts. when nazims' sympathies were with the miscreants and the DCOs had to be active to control the situations.Police and other law enforcing agencies had to face problems due to the interference of nazims in their affairs in punjab and sindh too.
Magistracy powers..
In order to separate judiciary from executive the judicial powers had been taken back from DCO.It has increased burden on distt. courts.Specifically during local bodies elections the governments had to set up election tribunals.These issues were previously decided by the Assistant and deputy commissioners very effectively.
There is no proper price control mechanism available.Previouly magistrates used to check it and fine the culprits at spot or even imprison them.

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When going gets tough ,tough gets going.