The main features of the CCB I think are essentially its advantages. It is, in the first instance, more generous than the previous benefit. Probably the main differentiating feature is that it is more targeted, which is where you get the disproportionate benefit for low-income and modest-income Canadians.
As you know, it replaces the mix of existing benefits with one integrated benefit. In that sense, from the perspective of the family recipient, it is a simpler benefit administratively.
These features are discretionary to the government of the day in terms of setting the level of the benefit, but I think those are the key design features that allow it to be targeted at those families in greatest need and middle-income families.