But Parvati is a mere mortal as long as Mahadev doesn't marry her, so how can she assume any Adi-Shakti form? If she is to be protected, only Mahadev can do it.
I'm glad they brought back Tarakasura, but wish they had shown him conquering Devalok. I'm otherwise pretty bored seeing the Devas just watch what happens b/w Shiva & Parvati like they're following the lives of celebrities.