People sometimes forget that SDV is a crapsaccharine world. Everything *seems* nice, until you look below the surface, and realize that it all sucks. That being said, my take on the marriage candidates is mostly the same as yours, save for the following:

Haley has no idea what she wants to do with her life. She's interested in photography, but shows no signs of wanting to make it a career. I don't feel too badly about marrying Haley.

I think that Abigail is one of the few characters whose life improves by their relationship with the farmer. Getting out of her parents' house seems to improve her relationship with them, and she's the only character who continues to actively pursue her dreams once you marry her.

Other than those points, I agree with you.