First of all, Kinsler comes off as a whiny brat here. He should have just kept his mouth shut and taken the high road, or at the very least focused all of his comments toward JD and not the team itself. Complaining about having to shoulder too much of a leadership role makes him look very weak. I've met Ian once and he couldn't have been friendlier. But, we've always known that he has rocks for brains, so this doesn't really come a that big of a surprise to me.
However, I will say that his comments about JD being a sleazeball have merit. You can dismiss arrogant douches like Josh and CJ when they bad mouth JD. But when nice guys like Nolan, MY, Moore, and Kinsler all say the same thing too, it starts to really paint an accurate picture of what type of person JD is. You need your GM to be very cutthroat and make the tough decisions necessary for your team to succeed. But you also want a GM who is upfront and honest with his own employees and treat them with respect. That, by all accounts, is where JD fails. There is a ton of backstabbing and double-talk that comes from his office. JD said in the media he was regretful for how he handled the whole MY fiasco. Now he's regretful for how Kinsler found out about the trade. You start to really see how his employees and former employees have felt blindsided and betrayed by him.
A good GM is able to trade away a longtime popular player if it benefits the team. But a great GM calls that player into his office first, sits him down, and tells him face to face and thanks him for his time there.
Sometimes deals come up that don't afford you time to get all your ducks in a row. I agree that a better scenario is to sit down with all parties involved, but if another team or another person leaks something...not much JD can do about it. It appears that JD does take care of those that he sees as worthy of being taken care of. He doesn't let valuable people walk over a little money, he gets players extended that we intend to keep. He isn't afraid to make extensions when most are left scratching their heads because the guy was still under contract. He doesn't tell people that he values "go test the market and we will get back with you later". If you provide a good value and a good product, JD will take care of you. That's what I'm reading, and that's what I want in a GM. Imagine if Jerry ran things like JD. It looks a lot like how the Pats run things. You have something to offer at a market price, welcome aboard. You want me to pay you based on past production, no thanks. You are unwilling to move to help the team, we will move you...to help the team.