Honestly, that's the least of the problems. The whole thing is extremely unfocused and all over the place and lacks a coherent thread. Arcanist are weak because they're higher floor but lower ceiling, Fighters are seen as good because they're easy to build, wizards are broken because they can do anything, so every caster has to be judged in comparison to Wizard, so we need to change what Wizard is?
Even the ultimate conclusion is odd. d20 Modern (where a character can't be a caster till level 4, and spells are generally worse than their 3E counterparts, and being a competent damage dealer requires little investment because guns exist) showed it's not so much that Wizards can do so much, but that non-wizards have comparatively poor versatility options open to them (as the casting classes still far outpower non-casters in d20 Modern) and no amount of making non-wizards better at their one thing will save them.