I also agree that this album didn't really showcase Karen's talent. It's not to say that it should have sounded like a Carpenter's album. But the quality that made Karen one of the greatest singers ever is not on this album. You don't get the sense that wow, I've never heard a voice like that. For example, with Close to You, For All you Know, Superstar, Only Yesterday, etc. etc., the magic and incredible talent and uniqueness of Karen are undeniable. Listening to Karen's solo album, I feel she is a good singer but not the greatest.
My favorite solo album song - Last One Singing the Blues
I agree with Richard, that Karen was singing too high on some songs like Remember When Loving Took All Night. Many have said that the anorexia affected the richness and timbre of her voice. But I also get the sense that Karen also was changing her singing style over the years deliberately. In one of the pre-Carpenter songs that Karen sang as a teenager called "And When I Die", Karen was a powerhouse. Karen in her early days had a huskier sound and it was clear she didn't like it. As the years progressed, she was trying to achieve a more delicate, feminine sound. Recall that she re-recorded songs for releases that originally were perfectly fine like Ticket to Ride, Merry Christmas Darling, and Top of the World. Comparing the originals to the newer re-recordings, you can clearly hear how she was trying to sound more delicate. I think as she got older especially on the solo album, she was trying to sound more and more light. But it was the depth that people loved about Karen's voice. Perhaps the anorexia also altered her voice. But I sense in Karen overall, a young women always striving to be more perfect even when she already was. It's a classic anorexic trait.