Yes, I've read about the lightning port. The big "plus" about it is it can be put in either direction unlike the 30-pin connector. And it has a cool-sounding name. It's a little smaller too which i suppose leaves a little more room for speakers/mics on the bottom of an iphone but that's never been an issue.
A "little" smaller? No, it's a lot smaller, and I doubt the iPhone 5/5S/5C and iPad mini and Air could be as thin as they are if they had to use the old 30-pin connector.
And no, I don't know of any other amazing technological advantage of the lightning port, other than it being smaller, but well, it is what it is. And no, I'm not an engineer and don't know any technical reasons why it might be infeasible to add magnets to the lightning connection, but then, neither do you. There could very well be a good technical reason why that isn't feasible, or it could be a purely design-based or usage-based decision. Since Apple isn't in the habit of making its decision-making process public, we'll likely never find out. All we can do is speculate.
And once again, your main issue is that it is hard to get iDevices in and out of docks and other such peripherals. But why are you so fixated on magnets as the solution?