I think Ollie is still around because he thought "they" would be pregnant by now and could peddle a tv special out of it. It looks like Maeva & James beat them to it.
Still, free holidays now and again are enough of a perk to stick around.
For Harvey to be crying about his actions a year later, I hope he's really changed and regrets it. He must have done really wild stuff. The tattler who dropped the tea on him hiring prostitutes must have been right. Now he sees Emily moving on to someone she sees marriage, kids & white pucket fence with he's hurt. I think Emily has been clear she wanted someone who was endgame and Harvey didn't grow up in time. So best of luck to Emily & Richard Gere Jr. She's come a long way from simpering after harry barron in ibiza.