[Opinions] Re: Thoughts on a nickname for my still-regretful name choice....
Definitely sounds like a difficult situation. But I don't really "get" most of this. If you weren't totally set on it, I don't understand agreeing on it to begin with. Also, if Thalia isn't your top pick, then I wouldn't even suggest it. You haven't said what your top choice is, either. (But it sounds like your husband didn't care for it, if all you could semi-agree on would be Thalia and Rosalie.)
I can understand your husband's frustration, and yours. However, "she is who she is" doesn't seem to fit since you haven't met her yet.
At any rate, I really like the nickname Ro.