What if it was changed to something like Tactics?

In Tactics, you could learn skills from any Job you leveled up. HOWEVER, only certain skills could be equipped on your current class (with the exception of Squire maybe?). For example... Cure could be equipped on any Class, but Cure II+ could only be equipped on "Mage" classes or perhaps Gladiator to make a "Paladin-esque" character.

What do you guys think about that?