Spells no longer scale with level
Woah woah woah. Hold on a second. First, yes they do (see below). Second, that is NOT Vancian. There was never anything Vancian about spells scaling. Some spells scaled, others did not, it was particular to the edition, and there was no unified theme throughout the prior editions establishing such a tradition and it sure as heck wasn't ever considered part of the "Vancian" nature of the spells.
the wizard class basically sucks at higher level from most accounts and testing
I disagree, but again, that has nothing to do with "Vancian".
and the new spells are basically refluffed 4E daily powers.
And that, my friend, is something that needs serious substantiation - not just a couple, but if you're going to say they are all "basically" like 4e spells, you need to back that up. I think it's an incredibly baseless claim. They are nothing like 4e. 4e had a massive amount of control-type spells in there, and 5e has a serious return to the roots of classic D&D spells that is entirely different from the 4e approach. So I want to see a big list from you backing up that claim.
And, none of this has anything to do with "vancian" casting. I am questioning if you even know what that phrase means, since your support for your claim didn't relate in any way to the vancian nature of spellcasters in D&D.
It is basically spitting in the face of anyone who liked D&D before 2008
Ah, and here we go, with the hyperbolic "spitting in the face" type claims.
and also invalidates a lot of previous D&D material
First of all, attack spells DO scale in 5e. For example, here is the entry for fireball: "At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each level above 3rd. " That is scaling.
Second, there are lots of damaging spells in 5e, and the higher the level of the spell the more damage it does. Every spell level for the mage has a more powerful spell that does more damage than the prior level of spells, just like prior versions of the game.
I'm starting to wonder, have you actually played a high level mage at all? Or even read the most recent playtest document in depth to examine how the spells work?