Hi Azcallin,
My father is going through a similar thing. He had part of his soft palate removed along with all but 2 teeth making it very difficult to eat. After his chemo and radiation he will have prosthetic put into place along with dental implants. They will not do this until after the Rx are over.
His surgery was on June 3rd and he will not be finished with treatments until October 8th. Its been very difficult for him to eat or drink because of the hole in his palate. He cannot use a straw at all or drink from a can. If he tries, it goes up his nose. He has been living on soft foods since the surgery - anything that is chunky gets caught in the hole. He has been sticking with easy to swallow foods that he can swallow on his good side where there is no hole in the palate. For the first 2 weeks after his surgery he had a feeding tube in his nose but is eating completely on his own now. He is also drinking ensure daily to keep his caloric intake up.
Please let me know if you have any questions. I can check with my dad for you.