I saw her little piece on CNNMoney. You're right, the problem is datalink loss. I can't tell you how many times I've seen drones taxi right off the runway or land rather firmly.

One thing that I have yet to really see is the sense of self-preservation. A pilot has a sense of self-preservation, he will do all he can to prevent an accident. May not work, or he may make things worse, but if a drone pilot has an issue, it's like "eh" and he drives off home. No harm, no foul, a drone pilot doesn't lose his life. And don't believe it'll be one drone pilot in charge of one drone plane, you'll likely see one drone pilot controlling ten, then twenty then many, many more aircraft.