My point is that Kain also had access to shields. It is rather convenient to say that Dark Knight should use a sword and shield based off of Cecil, but leave out that Dragoon should also be using a shield and a lance.

Tell me if im wrong, but wasn't the skill Cover not affected by shield strength in FF4?

I will give you that alot of stuff in the trailers has yet to be realised. But one thing alot of people forget is that we need more classes. A Greatsword wielding, Dark Knight becoming class/job would be welcome. The last thing we need is a sword and shield using class/job like gladiator or paladin as I don't think many would like it if they already had Dark Knight to 50.