1) Zoey's ArrivalThere is no time to fit so many events into one episode.
1) Zoey's Arrival
2) Preparation for Halloween
3) Meeting with Burke
4) A date with the chosen LI
5) Halloween
This can happen at the end of Interlude.
2) Preparation for Halloween
There is not much to do, it will be done off-screen, or very quickly.
3) Meeting with Burke
Yes.
4) A date with the chosen LI
Yes.
5) Halloween
Yes.
6) Talk to Jill to tell her about the "breakup"
It is almost obligatory.
7) Talk to M + J to announce the MC's decision
It is almost obligatory as well.
I saw quickly episode 7, there's a lot going on. I think all of that can fit into episode 9.