Um, they're definitely not going 'dark and gritty', but you'd be hard pressed to say they're going 'sweetness and light', either.
But really, I think you're missing one key point. Jackpoint is NOT Shadowland. Shadowland was an open forum for anyone who could get to the right node. Which meant you had assholes from every fringe group and crazies in there side by side with 'normal' folks and government men. Jackpoint is a private network, where people are there to share info, and build connections.
Looking back to old Shadowland posts, Clockwork definitely isn't a fan of the otaku, but before the Crash he wasn't anywhere near as rabid. In Jackpoint, he used to serve an actual purpose, being a source of knowledge on all things rigger-related, but he's become more and more rabid towards technomancers. Now think about the people in your life. Do you willingly go spend time with the neo-nazi chauvanist asshole who can't go two minutes without making racist or sexist statements? I'm not saying that Jackpoint should be a 'let's all be friends' kind of thing, but do we really need 'major sources of conflict' in the group? I don't know about you, but I got my fill of that kind of conflict and drama in high school.
To make a point, going through Shadowland posts, while the sniping between Sons of Sauron and Humanis members, or the constant dragon-baiting of Dragonslayer and his ilk add to the realism, the interchanges I like best are the ones that convey meaningful information, or that hint at the bigger picture. Sometimes those interchanges involve interpersonal conflict, but they don't get to the point that the nutjobs get. Laughing Man and Wordsmyth rarely have a nice word to say to eachother, for instance, but they keep it as respectful as they can, as one might expect in a group of people who don't have to like eachother, but do have to work together. You can have 'conflict' without trying to keep the rabid dog from getting loose.