In some MMORPG, you can ride flying mounts across the map. However, this is Final Fantasy XIV: A Realm Reborn. Imagine for a moment that Gladiator turned into Ninja for some obscene reason. Would the Ninja hold the second weapon like a shield and never use it since it derives 100% from Gladiator one handed skills?
Summoner/Scholar is unique in the sense that they are not the same role. Healer and DPS will not play the same because their functions are completely different. It's when you take Arcanist => Summoner (DPS) and Beastmaster (DPS) that's when the lines are blurred. 5 skills isn't enough, 10 skills may still not be enough but when you tread into 11+ skills then you can sufficiently say they are different jobs. So 4.0?you take the example of the summoner/scholar for say that the jobs will feel the same. and it's true, with 5 skill it will look like a lot. it's why i think they need to add level before add class. for make dual class more....different. but even if that the case.... the core skill will still the be same...
Old FF games are what give us a basic understanding of what is to come next. FFXIV took on the Summoner approach as FFIV's SMN while Warrior didn't really exist until now where it's depicted as a Beserker. (Recall that Warrior was only a new name for Fighter from FF1 and never existed from then on afterwards.) So it's more like we don't expect Thief to come as a healer. Or Calculator to come as a tank. FFXI made the foolish mistake of accidentally putting Ninja as a tank but that simply won't happen in ARR, at least not by accident.other point you say that talk of the old FF games is not good too... but when you say that ninja must be dual wield and thief one handed... you are using the old Final Fantasy as basic for decide this. the point it's... they have already take a lot of liberty and make them jobs/class them own turf. the warrior, monk,... don't feel like the class/jobs they are coming from. the best example it's the warrior that a mix of the berserker and viking.