Don't forget the Lokai/Bele "units"
Having just re-watched ENT, still torn whether prefer S1-2 T'Pol or 3-4. It's a shame she was ill filming that final season as she seems so wan and underperforming compared to earlier seasons. Or maybe Jolene was just bored
I think bored is probably the right answer. She had said in several interviews she was ready to move on to other things.