Toss up between your current option and option 3. I reckon with Libba out, Bontempelli will get consistent midfield time with Macrae getting a regular tag.
Probably around the same. In an ideal world, Billy plays across the half back similar to the role of Birchall. Considering the hawks will have Birchall back along with Hodge and Mitchell rotating through I'm not sure if Billy will get a solid spot. Jed can play inside mid, forward and wing and has had a solid NAB cup.