Well they would first have to overhaul the long overdo problem of most skills being exactly or close to the same.

It brings back the FF11 battle system argument that, at least they had the foresight of giving things like WS very specific properties so that people would tactically select between them.

The who idea of skill chains revolved around WS properties as much as damage and as much as types of weapons. Much more elegant then what we currently have in FF14.