That the focus is mostly Corwin with Ranma's curse doesn't bother
me much.  These things happen with fusions.  

Ukyo is kind of boring actually without her obsessions or ulterior 
motives.  Perhaps you should give her some.

Ranma would be better motivated if you point the finger more clearly
at Kuno as the source for the attempts on his life.  

Usagi's motivation really doesn't make sense, unless her idealism is 
phony.  After all, Ranma isn't dead, so Kuno didn't kill him, so what's
her beef now?  

Really I think Usagi's outfit looks more like a figure skating costume.

So, Ranko went for years without a hot shower or bath?  How does that 
work?  

I don't have a lot of sympathy for Usagi or Ranma.  Kuno's obviously
the better king candidate.