Interesting posts, wondering if there are any starters / concepts for the sarab cult and its origins. We had read about Kaapalika cults in the pallava dynasty, this one seems interesting.
Ideology of Sarabswarar is very much hardcore shaivisum, yet the king promoted Ramayana and renovated other vaishnavaite shrines (Kamban florished during this period).
Wish we had more data to analyze the mind sets of these times.