The task force was made up of representatives of a diverse group of organisations and were given only 3 days to do what the DOT asked of them.
They weren't there to discuss what could be done
to assist the FAA in enforcing compliance with any impending FAA Rules, even if the FAA cannot mandate so under current law.
All they were there to talk about was how to to develop a process for registering drones and if they were asked to discuss how to make restrictions, they'd still be discussing and would never come to any consensus.
They had a specific brief which was:
The FAA charged the Task Force with the following three objectives:
1. Develop and recommend minimum requirements for UAS that would need to be registered.
Factors to consider include, but are not limited to: technical capabilities and operational capabilities such as size, weight, speed, payload, equipage, and other factors such as age of operator.
2. Develop and recommend registration processes.
Factors to consider include, but are not limited to: electronic means for registration, data retention and storage, fee collection, and information required to be submitted for registration.
3. Develop and recommend methods for proving registration and marking.
Factors to consider include, but are not limited to: how certificates will be issued and how a UAS will be able to be identified with the registered owner.
You can read the task force report to see the diverse group that made up the committee and what they actually did here:
http://www.faa.gov/uas/publications/media/RTFARCFinalReport_11-21-15.pdf