Streamlining is not always a bad thing if you are talking about actually making things less complicated but not less difficult. But, If you are talking about the "streamlining" that took place in Dragon Age 2 (cutting content because of only 8 months of development time) then it would ruin Skyrim.
Yup. Streamlining is about removing unnecessary systemic complexity while maintaining the basic function or desired outcome. Streamlined does not mean less skills. Nor does not mean less depth of character definition. It also does not mean scrapping simple guiding systems (such as attributes) in favor of spreading the guiding values into a hodgepodge of unlinked items.
Doing something thing like that is the exact opposite of streamlining and seems to be exactly what Beth has done.