heya speed!
I like the way Tim Burton presented this story through a very sensitive and delicated animation. About character development, I think it has the necessary... The movie is focused namely in Emily and Victor, and for that I think it is well developed.
About the musical numbers, I totally disagree with you...sorry...
The Piano Duet, and the music with Emily, the Worm and the Black Widow are extremely well done!
(Apart from The Corpse Bride *main* theme, wich is beautiful in my point of view.)
For this, and all the small things, like the colour of the set, the personality of each character, and the great choice for each one voices, I say that Corpse Bride is a really good movie.
Anyway, thanks for your constructive opinion speed! very kind of you