I am really struggling with this. I'm pretty sure I have a full grid, but.....
a) I only have 5 of the answers prior to the thematic alteration
b) i only have 10 of the extra words - and it is anybodys guess if all 10 are correct
c) I have the unaltered answer for 23d, but not a clue what the thematic alteration is. nor the definition for it
d) do not understand 30a at all
Other than that, everything else seems correct