They're not bad names at all. Just not currently popular.
I did teach a Deborah a few years ago. She'll be 16 now. Before that, there was one 2 years below me at school which seemed really dated then (around 1998/1999 she would have been 12ish). All the others I know are in their 50s and 60s.
I knew lots of Kimberly/Kimberleys at school (1980s babies). Never met one since but I think it's pretty. Exactly the same with Michelle - still know lots but they're all in their late 30s - early 60s. Less keen on it but that's because I don't like it shortened to Shell or Shelly. But I really like all the Michelles I know which warms me to the name.
I've only ever known one Wendy. She'll be in her early 60s now. I don't like it but I think that's because I was afraid of this woman as a child.
Weirdly. I've never met an Amanda. Definitely think of it as a 60s-80s name though.
As a list, they aren't my favourite names from that era at all. But Kimberly is my favourite, I think it's pretty.
I like:
Amy, Caroline, Emma, Hayley, Joanna, Jennifer, Jodie, Kate, Laura, Lauren, Melissa, Melanie, Natasha, Natalie, Nicole, Nicola, Rebecca, Rachel, Ruth, Sarah, Samantha, Stephanie, Tanya