I thought it would have been interesting to have as a series long arc a continuing question about the true relationship between the command team, since there was, almost from the first time they met, an undeniable chemistry between the captain and first officer. There could be ambiguous hints, curious coincidences, questions by lower deck personnel, etc. Why not exploit something like that as an on-going arc? I, for one, would have enjoyed the speculation (even if it remained unresolved until the end).