there seem to 3 points you are bringing up:
1. a Matthew kosuta (not sure who he is: is he the person you referred to on teh otehr thread who has 'an informed opinion"?)said that according to Sujin, "Cetana as a cetasika is said to only arise, as with all paramattha dhamma, due to “conditions and accumulations”, a person as anatta cannot will another anatta constituent into being. Kamma as traditionally understood in the Sutta literature is thus negated
Do you think kamma is negated because of the anattaness of elements such as cetana? In fact Sujin's talks on kamma and vipaka range into hundreds of recorded hours. Kamma and its results are given great emphasis, I would say.
2. Some of Sujin's students have questioned the Mahasi technique. But does that mean she is 'out there', as you put it. I think you would have to provide evidence from the texts, what if the criticisims had some justification based on scripture.
I should note that a book by another Burmese 'master' that dissed mahasi technique is banned in burma, so it seems to be a sensitive topic, but I am happy to participate if you want to say anything. Either we can do it here or on that topic you gave a link to (thanks for that).
3. How does one cultivate samma samdhi and Samma sati according to Sujin?
I make a new topic to discuss this in detail. viewtopic.php?f=19&t=5167