I like this. It keeps the style of the original bard while removing the retardation that is vancian magic.
The only thing I'm not sure about is how, discounting the different energy auras, there only are 14 auras to choose from. That doesn't leave too much in the way of actual customization for that portion of the class. I'd recommend doing another pass and seeing if there are any other effects that would work for bard auras.