In regards to #2, it seems like at least one piece will move before the season, but if not, it's not a big deal. Though Turner plays distributor, he's still a 3. Rozier and Hunter are rookies and so they probably won't receive much action anyway. James Young can also play the 3 spot as well, so it amounts to IT, Smart, and Bradley receiving the bulk of the minutes at guard, with others coming in for situational purposes (small ball) or injuries.
As for #6, Bradley could be traded since his value is still pretty high. But I think Ainge holds off on Sullinger until he rebounds for his contract year. Right now his value isn't as high as it should be, but if he improves during this upcoming season, that's when we'll see him either moved or signed for a long-term deal.