Sorry, I assumed they were asked on Twitter. Watch the video, he looked like he was reading some text then started answering them.
For your concerns, go post in Andreas Antonopolous' Twitter and bring all of them there. I'm sure you will get all the answers you are looking for. Or show him your thread, maybe he'll grace us with his presence. Hehehe.
Plus, I agree. There are problems in LN, that's why it's not even in beta yet. But that does not mean the developers should not work on a layer 2 solution.