5. Yes.
4. On Airbus, your Captain can't help you to feel the side stick input he is making - hence no assistance, only take over.
Have you tried reading
http://www.skybrary.aero/bookshelf/books/179.pdf ?
It explains why you can land with wings level in X winds up to about 15 kts, but need a combination of bank and crab angle technique with stronger X winds.