[yorwba]

> Spelling and pronunciation is unambiguous (at least for kana where there’s no chance to misread).

Even kana have exceptions where spelling and pronunciation are ambiguous. E.g. は/へ, which canonically represent [ha̠]/[he̞] but are also used for particles pronounced [ɰᵝa̠]/[e̞], which would usually be written わ/え. And こうし pronounced either [ko̞ːɕi] when it means 格子 (grid) or [ko̞ɯ̟ᵝɕi] when it means 子牛 (calf). Then there are aspects of the pronunciation like pitch accent and devoiced vowels that can't be expressed using kana at all...