Team area breakup implications

We have setup a CLM Project (RM, CCM, QM) with multiple teams in each app's PA. All the permissions, etc. are defined at the project level .  We have had some grumblings on using teams (e.g. in 502 for both RM & QM - permission inheritance do not flow down, in RTC you need to be a member at the project level to create streams) and management wants to know the implications/impacts on going to stand-alone PAs.

From what I see: 

For RTC - we can move work items, and inhale code streams. 

For DNG - I see this as a reqif export/import

For RQM - probably a similar export/import process

This however does not give a complete picture, such as what about project plans/test plans, build results, test execution records, and inter-app links eg. requirements to work items, to test cases etc..

Has anyone done a split like this and what are the implications you noted?

Anyone else have input into such a breakup?

Regards

Norm Dignard