I'm not worried there, I'm sure Telltale won't allow the game's art style to go into super-realistic realm. I think they said the idea is to move a tad away from the candy-colored Hit the Road and a little more toward the comic's tone. I'm sure it will still be very cartoony, to do otherwise wouldn't be good. I think they just mean, like, look at the difference between one of the comic panels and a screenshot from the game. The comic is more subdued, darker, and I think that's the approach they're taking.
I like the idea of unnecessary minigames that you can play whenever you want a la Hit the Road, but I also wouldn't mind one or two like "Wak-a-Rat," which was necessary but also very easy and fun. I think the minigames in Freelance Police, or at least some of them, were both necessary and replayable later.