Everything else with my 6.0.1 installation is now successful and complete up to DCC, but the DCC jobs are failing on their first run.
I see error messages like:

Error 500: CRRCD1500E An exception org.apache.http.HttpException was caught in the class com.ibm.rational.datacollection.common.authentication.DCCHttpClient 

from calling the function send.com.ibm.team.repository.common.TeamRepositoryException: Remote host closed connection during handshake.

01/08/2016 14:48:24,530 [dcc: AsynchronousTaskRunner-5 @@ 14:48] ERROR com.ibm.rational.datacollection.service.internal.schedule.TaskScheduler  - CRRCD9011E Storage areas have not been created.  Please run set up to complete application finalization. 

01/08/2016 14:48:54,794 [dcc: AsynchronousTaskRunner-8 @@ 14:48] INFO com.ibm.rational.datacollection.service.internal.util.StorageInitializer  - CRRCD7503I The Data Collection Service Data Warehouse resource does not exist yet, import the default data warehouse resource.

none of which make sense as everything else was fine.
I also notice that when DCC is running, the CPU usage spikes to 100%, or very close to it.

I have JTS, RTC, RM, DNG, DCC, JRS, GC, LDX and LQE installed on a VM