I never understood the hype with the first dig. It was so average for me.
But then I got heist, because I like strategy games and also got to know the devs who happen to be wonderful people, and it was so much better than not only dig, but other games in it's genre.
So I decided to give dig 2 a chance because honestly it looked improved over the original, but it's way better than the original and so much fun to play.
It's almost as if dig 1 was a prototype and dig 2 is the actual game after feedback