Impressive endgame and good and tough clues. Yet filling the grid was rather a grind, with very little help to be got from the ones already entered. I wonder how the editors assessed this against the usual guidelines for checked letters? Take eg reel 5. That has 3 unchecked letters out of 8, but 3 of the checked ones are provided by 1d, so in practice it's much worse than having 5/8 checked, even without the fact that the checked letters are jumbled. It seemed stingy when solving.
Fortunately enough help was got by filling in the thematic bits towards the end.