Quite honestly, I think Jon is just jealous he got cut out of the Kate Plus 8 equation, and though she's immensely disliked, she did DWTS, got her TLC show back, and has had other opportunities since their split. While he's been seen as a womanizing deadbeat partier (not saying he's a deadbeat, as I believe he loves his children, but that's the image). I do hope he's got a better head on his shoulders and really believes what's right now. I think Jon went through a time after the split. Hopefully he's doing what he's going for the kids, and not out of spite. The kids always get hurt in nasty splits like this.
I think harder times are yet to come for the Gosselin kids. Not only having to deal with their parents actions and the tabloid scrutiny that followed, but also for their entire lives they've gotten everything handed to them, and their parents have made a living off of them. Eventually, all the freebies will dry up that they've come to expect, and I'm sure a lot of the money they earned while being on the show has long been spent. I've never felt anyone was really looking out for the interest of the kids, including those who went on any entertainment news show that pretended to care.