Is <j>'s pronounciation as [dʒ~tʃ] dialectal variation? Free variation?
And what about <j> (palatal resonant)? There's no orthographic difference between <j> [j] and <j> [dʒ~tʃ]?

Although I like carons a lot, and specially above s, if [ɲ] <ny>, then <sy> for [ʃ] would be awesome. Why so few conlangers think of <sy>, by the way?