I am close to finishing “Adopting SAFe® for Your Organization: Achieving Business Agility from Small to Mid-Scale.” We take our own FLEX approach (FLow for Enterprise Transformation) and apply it to SAFe to help solve virtually all of the challenges we’ve seen small to mid-scale organizations have when trying to adopt SAFe. The result is using the core of SAFe while fleshing it out with Lean-Agile principles and patterns of adoption to create a simpler framework, albeit perhaps no longer SAFe, to use.
The list of these challenges is at https://goo.gl/Zcx7cu
Please take a look at let me know about any others.