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?
Yes there is some merit. Sure, you could but if WotC were to ever change it I would take a reorganization of the rest of the class features. The ripples would be large enough to require a new edition.
I think explainer videos would help. "You know that 7 year old kids are not enrolled in the 7th grade, right? Well in DnD . . ."
