All quiet...Either that means that it was so easy that everyone has finished and there are no issues ?
Or.
A couple of things to watch for. If you can identify any of the 4 words given by the delete/add/change letters, then make sure you explore it properly. In 3 of the 4, TCD defines the group of 4 to which they belong.
Being able to enter the 6 circled cells gives a lot of help to grid construction.
3 of the 4 quadrants aren't typical crossword format. One is more like a clueless puzzle, a grid for the clueless, which just requires one letter changed at a time. Or at least I'm assuming that's how to do it. :) (Otherwise there is an ambiguity as to how to enter rows 2-5). Two other quadrants, and you may have been concerned that there aren't enough clues to fill the quadrants, involve using the same answers twice.