This is addressing exactly 1 pillar of play: combat. Admittedly, it is, by far, the biggest in most campaigns. And yes, I'd argue that little to no tweaking is needed in the combat pillar.Arguably there is never an imbalance.
The Fighter falls behind the Wizard shenanigans around the same level that the Wizard falls behind the Fighter damage dealing.
Even at high levels, the game tends to need both Fighter damage and Wizard shenanigan.
But what about the exploration and social pillars? Can you honestly argue that the fighter doesn't fall far behind the wizard in the other pillars - especially as levels progress?