There is some merit to the argument that spell levels are overly complicated for newbies.
The best argument i heard is, why can't spell levels match class level? Why can't a level 5 wizard cast level 5 spells? That would require 20 levels of spells and require some realignment but that might help in re-examining spells.
We have charts that track 20 levels. Why not for spells?
?
Because the charts DO track spell levels, its right there in the character creation when you select your class.
The problem is Larian isnt communicating that information. Its (again) not the fault of 5e, but Larian.