As NYDisneyMom says, you don't need to eat in your appointed restaurant on the last morning, you can eat at Topsiders. You do need to be out of your room pretty early. There will be lots of activity in the hallway that morning, so it's not like you can sleep in, or even relax. When you have early seating, you're scheduled for breakfast at 6:30, so Topsider's is a nice alternative. Everyone has to be off the ship by 9:00am, so there's some element of being rushed, but I don't feel like the crew is rushing me directly. They're very busy beginning to turn the ship around, and that sense of urgency kind of rubs off on you, but I wouldn't say they rush you.
We usually eat at the restaurant, so as to be able to say goodbye and thanks to our servers. Since you pack the night before (and leave your bags out in the hallway to be collected), there's not much to do in the morning but take a quick shower and pack up your carry-on. It doesn't take long to be ready to vacate your room.