1. As someone who loaths console controlers, I thought the controls in 2 and 3 were very nice.
2. Yes. I imagine it's the same 3rd person. Is that a problem?
3. No. Bioware doesn't ask you to pay 60$ for a 9 hour game. Right, Bethesda and ID Software? I guess we're looking at the regular 30+ hours.
4. Let's see. Off the top of my mind. 2 humans, 1 turian, 1 asari, 1 krogan. Sadly no Quarian, FUCK YOU, BIOWARE!!!
5. The story of Andromeda is in no way linked to the story of 1-3. The arks departed the Milky Way galaxy somewhere between 2 and 3, so the expeditioners have no idea what happened back home with the whole Reaper conflict, nor are they affected by the green ending. Anyone can jump right in and doesn't need to play the prequels to know the full story.