@nyleriverson23 With no offense, I think you misunderstand a lot of what this DLC sets out to be. To be fair, things are a lot more nuanced and up for interpretation since there's no definitive answer out there, but you can't just assume they wanted to ruin the true ending.
@nyleriverson23 4. It's best to come up with your own interpretation, but they did not ruin Mark and Nicole like you say. They are there to watch over them.
@nyleriverson23 1. Just think about it. They both just revealed their biggest secrets and how they've drifted apart over time. It's awkward for them. That's what makes the ending more significant.
2. Coincidence, you can see him looking around like he's been searching for Nicole for a while