I once new a girl named
Alycia (ah-LEE-see-uh). She said her parents wanted that pronunciation, so they made up their own spelling for it. However, she said it is always mispronounced as
Alicia (ah-LEE-sha) when people first meet her.
I would pronounce
Alicia ah-LEE-sha or maybe ah-LISH-uh.
I'm not such a fan of
Alice, but I guess it's alright.
The
Alycia I knew is 22 now, but I don't remember her middle name.
I think you are right that this name will always be misspelled or mispronounced. She will constantly be correcting people. However, it is a gorgeous pronunciation (ah-LEE-see-uh)
I think it's neither too common, nor dated. Yes, with all the variations, it's probably up there, but because of the variation is doesn't feel too common and your pronunciation even has a unique feel.
Alyssa has softer sounds, which tend to become more popular. I like
Alyssa a lot, but I'm not sure if I like it better.
Ali is a good nn, but since it's usually short for
Alison, that could be another source of confusion.