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This is a duplicate of RFE http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=138176 Please add you votes to that RFE for this requested feature.
With that said, you are correct that Dual Control locks down most of the fuctionality on the server. We have had a hard time really coming up with a design that could allow for only "some" actions to be dual control enabled. Let's take your example of an operator simply resuming replication due to a communication error. The issue there is that "resuming" replication can in itself be a destructive action, and CSM has no way to tell whether it is or not. The secondary site would have consistent data from which a customer could recover from, but issuing a start command simply to restart replication, could in fact be used to overwrite that consistent data with corrupted data on the primary. So determining the right level of control or in this case right level to disable dual control is tricky without opening up the ability for a malicious user to cause damage. We could go the route of letting the customer choose the risks they are willing to take, but the concern is that customers might not understand all the risks and it wouldn't be clear if we provided the flexibility. But we're more than happy to discuss this further with you to see if you can think of a good balance that protects the customer while providing the flexibility you desire.
Please comment in RFE 138176 for further communication.