I like it. It's vintage. Totally useable. And somehow stronger than
Dolly. I see a
Dot as rather outspoken and loud. And with our contemporary online culture,
Dot seems almost like a sci-fi kind of name - after a beloved dot com? Also,
Dot Matrix of Reboot!
I think
Dot is outdated enough as a nickname to stand as a full name. I bet very few of her classmates would realize that
Dot was a nickname for
Dorothy.