I look at the Job system of old as guidelines and suggestions for building your characters in other games.

I much prefer the customizability though, which is huge in VII, bigger in VIII, and still present even in IX - how you can customize your character within their job, rather than among jobs.

So I don't really have complaints about it. In FF, you're better off having each character do their own specific thing best rather than clones, and that's what some of the earlier games (I, III, IV) are all about.