Hi Mystogre
I found the quote for 20d in my book of quotations from Henry IV part two. Unfortunately I couldn't find the answer to 19d as in my book of quotations Cordelia hardly speaks.
I have found a word for 25ac which could mean disadvantage and I don't know the word for wobbliness. I changed my ending for 15d, which gives me only one word for 27ac, which I can't parse.
I've guessed at answers for 28ac and hence 23d.
Still to get 19d, though I'm not sure of my answer for 26ac, and 1ac and 1d