I agree with this. But I'm still thinking that we break down the spells into "Believe False Fact", "Do a Thing" and "Caster is Awesome and Terrible and Wonderful and Majestic" in the old, sorta-biblical meanings of those words.
I'm pretty sure I want to replace the basic Enchantment/Charm spells in this field with ones that do what they say on the tin.
Second point: Do we want a first level spell that lets the Bard trivialize everything with Diplomancy? If you give the Bard a +10 to his Diplomacy checks, for 1 hour per caster level, you pretty much have Kilgrave the Purple Man trashing the campaign world.