Maybe this suffered by being alongside Android’s excellent Listener offering.
Most of the grid was filled with scarcely a bent eyebrow but the subsequent cryptanalysis was just a slog - and most serious real world cryptanalysis must be just like that, only harder.
So I’d have liked to go all Hopkins and say “Sheer plod makes plough down sillion shine” but what was revealed by all that effort just seemed pretty mundane. I hope I have missed something and will, in due course be made to feel as stupid as I deserve.