i think do right by them would more be that Jane decides for whatever reason she wants to be in Aus and therefore can't be with Mike, but he wants to be in UK (even though his kid is in Aus). so a nice respectful breakup where they stay friends.
giving jane a partner who is always long distance isn't very good for the actress (though she gets to occasionally snog Guy Pearce!!!!!!!!) as means less storylines about her love life/focus on her. so not good for her.