M.M.
1. At that age, I started using a plate. It was always a mess, and DS loved to turn it over when he was finished. But I used one, because that's how we all eat. I started giving him utensils around 15mos, and by 18, he was pretty good with them.
2. Kids are different. They're constant balls of energy. Mine lives on pasta, and my doctor recommends that as a meal. I wouldn't worry about it.
3. I dropped formula completely at 12mos, and just started giving whole milk in a sippy instead. DS didn't seem to care or even notice. So I think this one depends on how picky your little one is.