Sorry, I have some reservations about Maria Carolina being a splendid Queen Regnant for several reasons: 1) I've never read that she turned Naples into a kingdom of prosperity and in fact, as CoutessKate said in another thread, supported a regime of corruption and repression; it wasn't even the best governed or 2nd best governed state in Italy at that time (I've read that Tuscany and Parma were); 2) she was quite violent and was responsible for putting to death many people (her son-in-law Orleans said that she was cruel, violent, and her hands were stained with the blood of people); and 3) she seemed to have alienated family members, near relations and all her previous allies; it's impossible that all those people were at fault and she was blameless. So I cannot view her as a good queen regnant.
MC may have been the daughter most like Maria Theresa but it seems that she also inherited MT's worst faults -- petty, vengeful and unforgiving, full of hate to her enemies, bullying, and being critical of everything and everyone else, among other things.