This is an aside to the OP's question, but my answer is no. At least, not in my opinion.
Folks seem to think "limited number of times per day" = "Vancian". But there's more to a Vancian system than that. You will note that a great many monster powers in prior editions are "X # times per day", but until recently, nobody ever referred to them as Vancian. Most classes have had powers that were usable some number of times per day, and those weren't called Vancian, either. Only the spell system has been referred to as Vancian.
In Vancian magic, you typically have a longish list of spells you may cast, you pick some of each level, and prepare those for the day. The choice and preparation are rather key - it is the heart of what was taken from Vance's fiction. In 4e, your choices do not change from day to day. The powers you have are the powers you have, and they don't change from one day to the next. You may be able to retrain powers as you go up in level, but that's not nearly the same thing.