I think Sarah should be taken out of this list... bon already said she's the one that's going to have way more scene later (probably main quest).. Jet i dont know how he's planning to work on her, since she's tied to warren (maybe later too).With Daisy out of the way all that is left in the terms of side quest are
There are several more possiblies for who gets the next update.
Sandra
Beth
Jet
Sarah
Amy
Laura
Ronald
Christian
Shasha
Now if the post was correct Beth is the next update but which one of these character will be lumped with her?
Sandra - Beth- Christian - markus - Daisy can be finished easily i think, unless he ties christian and Daisy to main quest or warren path.
Ronald? isnt that guy on jail lol ... if you mean "helping him" on the Miss taylor thing on the first part of the game, i hope Bon doesnt go that way back for just a side character that doesnt have nothing on history lol.
Shasha depends on how he's going about her, if he goes on the "Shasha route" instead of Sarah, this updates needs to be pretty worked since a lot of things would be locked and Sarah is like a pretty important character for when lucy enters the history. if he goes on the "Make them friends again", he can make a good update on her but nothing that takes way too much work.
Laura and Amy.... fuck man, i dont even know why we still dont have nothing on them, but the way the updates are coming, it seems that they will be the last one of the side characters.
Since he's going to play the game himself, maybe he will change he's mind about how the characters will be updates.