Appearances can be deceptive - after failing to solve any across clues at first reading I feared the worst, but once I solved a few down clues it all fell into place quite fast (though the SE corner was a struggle).
Not quite sure about the endgame. I have 14 letters in two rows (without an indefinite article), but the 7 letter word-and-space on the next row seems redundant and reads awkwardly.