Our first 2 travel trailers had couches. The first was along the front and the curved wall from the nose cap make sitting on the couch horribly uncomfortable. It was a jack knife that turned into a very uncomfortable bed.
The second trailer had a couch along the side. It had a flat back, but also was horribly uncomfortable. The back was just about high enough to hit the middle of my back. It was narrow. It was horribly uncomfortable. And you guessed it, we very seldom, if ever actually sat on them because they were both so uncomfortable.
Our third camper had stand alone furniture in it. We removed the kitchen table and chairs, the 2 rocking chairs that were in the large slide and replaced them with a true household 3 seater, recliner, high backed, very comfortable couch. We use it all the time. In fact, it was so comfortable, we bought an identical one for the house, and the matching recliner.
Couch? Yes! But it's got to have the right one. Personally, we like high back cushy couches so when sitting in them, our head can rest on the back, we can sloush in them and literally melt into the fabric. With any built in RV couch, you won't get this.
So yes, if you can find your desired model with a stand alone couch, you will probably be very happy with your decision. However, if you settle for a built in or a built in jack knife, you'll regret it. If you get stand alone furniture, you can easily replace and swap out anything you want if it doesn't work for you. I strongly advise, get a stand alone furniture model.
First trailer.


Second trailer:
Our kids were out of the house when we purchased this trailer, but we were still hooping they'd come alone, thus the bunk house version. As it turned out, they never did. The bunks became nothing but storage shelves.

Third trailer with original furniture. We got smart. We looked for a couple's trailer only. We found it. We switched the 2 rocker chairs and the 2 seat hide-a-bed in opposite slides. Then the 2 rocker chairs and the kitchen table and chairs were removed eventually, and replaced with the couch below:

Third trailer with new couch:

I put wheels on it so it can turn to fact the back window.

Fyi, our son and grandson now camp with us ever other week-end. Keeping the hide-a-bed was a wise choice. It's a horrible bed, but it does have an air mattress that lays on the floor just fine and then is actually quite comfortable.
Get the couch, but get the right one!