about SSP's Thodi being different from today's Thodi... there are a couple of points.
First, it is well known that MD composed certain kritis (like Kamalamba Samrakshatu) in the "older" version of the raga (Ananda Bhairavi) and other kritis (like Manasa Guruguha perhaps) in the more prevalent version of the same raga. Maybe he was following the same template for Thodi here? So we have Shri Subramanyo and Dakshayani... and maybe even Shri Krishnam (which is of doubtful authenticity) composed in the more prevalent Thodi. What complicates matters is that, IIRC, Kamalambike is the only kriti in Thodi that is notated in the SSP. so there's no "proof" of him composing in two different versions
interestingly, rupamu joochi as notated in the SSP is also in that older style of thodi! and Subbarama Dikshitar's ragamalika varnam (Garavamu), sung so beautifully by Prof SRJ, has a thodi passage, which is the thodi of today. i am not sure how it is notated, though...
Second, when i listened to the two versions of Kamalambike sung by TMK, i could see why Thodi has become what it has become... you expect gamakams in certain places, and when they dont come it feels un-Thodi-like... its almost like an invisible thread running between the two Thodi's... i can feel it, but sadly cant explain it.