1. Yes, it was designed for tablets, but so does windows 10 have a "tablet mode". Many people, incl. me didn't like the way windows 8 looked. Haven't even used tablet mode on my tablets xD
2. You can set a time when you would like it to update, it is your choice. Go to settings, Updates and change your "working hours"
3. You have a point.
4. Can't you turn this "feature" off?
5. Is this so big of a deal? Ok, they collect this, but what doesn't collect data nowadays.
There are cons about windows 10, and so are their positive things.