Lanefan
Victoria Rules
Vancian pre-memorization isn't really meta in and of itself; one can if one wants quite easily justify it within a setting as being how magic functions - you have to prepare the spells now that you're going to unleash later.IMHO, this is the metagame that the player does as part of the "strategic play" of the game. If you want to say that Vancian casting is 'magic,' then we may as well call Fate points 'fate.'
But it almost inevitably becomes meta very quickly, as players try to guess what's coming up that day using information their caster character doesn't have. On the flip side, there's the inevitable annoyance (both in-character and meta) when you get to a spot that needs a particular spell to continue and nobody memorized it, so the party grinds to a halt for the day.
I don't mind Vancian slots - way better than spell points, and I've used both - but I've come to detest Vancian pre-memorization in any form.