It wouldn't be too bad if the Wizard wasn't allowed to be every type of wizard all at once (because the subclasses are mere blips to them). They would have some sort of limiter to where they couldn't just have all those spells.
If 5.5 said that Wizards now only know a number of spell schools equal to their proficiency bonus (cantrips don't count) or gave us a half-caster wizard (who got class features a la the Warmage, Beguiler, and Dread Necromancer) I would be rather interested in what they were doing.
It's really telling how the Fighter and Wizard are two sides of the same "generic class" coin and yet the fighter gets to know maybe two fighting styles and honestly can only use one effectively unless they went Dex or whatever. Meanwhile the Wizard can just cast any magic spell ever.