Thanks for the honest opinions. I kind of feel the same way about it as you all said - sounds made up and futuristic.
Kate doesn't seem long enough for a full name to me, I know it is but I have all these silly rules in my head which makes it very difficult to name a baby! LOL Plus, all my kids have a long name (at least 3 syllables) with a nn that falls from their full name.
Katey is too nickname-ish to be her full name. Perhaps I should start looking at names that go well with Kate and have two first names to make it fuller sounding...