There's a bunch of small details like these, that bed is a small memoriam for the old suburbs houses as one of them had the exact same bed (I miss the curtains

).
Some other small stuff:
One of the towels on the sun benches at the beach have "PH" on them.
"Scottie Sucks" grafitti at the back of suburbs Jennifer's (I'm too much of a V1 newfag to remember who he was)
You can sit on one of the gravestones at church.
City hall had a secret teleport spot for the beta of dispatchers that led you to the now non-existing admin room.
The hospital in v1 had a locked room you could only enter with noclip, it had a sofa, old fashioned TV and some explosives on a coffee table. I don't know why this was a thing.
Puffer Market was supposed to have fridges, the model should still be in the map content pack but textureless.
The coffee shop has a pretty nice chalkboard.
The crane at is usable but you get yelled at by Bjössi if you use it, the old AI controlling it in V1 was a murder machine.
The fish and chair shop are still a thing.