It's my favorite so far, gameplay-wise. I still adore the aesthetics of HM GO, but LC GO dramatically improved on the control scheme. DE GO carries that forward, and seems to be introducing a lot of new gameplay elements which produce very cool puzzles. That said, they don't even attempt to explain these new mechanics, which is a bit puzzling. When I first encountered a yellow hacking terminal, I was tapping and swiping all over the place and couldn't figure out what it wanted me to do for over a minute (drag from the terminal to the destination of the hack). Similarly, when I first encountered a puzzle I couldn't solve without shooting somebody, I saw no indication that such distance attacks were now possible.
I admit, I had hopes that this would introduce a much more open style of puzzle, in which you could use abilities to sneak by without having to kill anyone. But I give them credit for doing away with that hope literally in the first second of the opening cinematic.
The daily puzzle plan sounds awesome, but I'm somewhere in the 50s of the story mode, so I haven't tried them yet.
EDIT: Apparently, it was the early 50s; story mode is 54 levels long.