Neonchameleon
Legend
The big question is why should spellcasters get a near monopoly on cool? About 40% of the PHB of most editions is dedicated to spells, that is to fluffing up the spellcasters and making them more cool than everyone else. Meanwhile the non-casters might only get a couple of pages - and of that something like the current Indomitable is not very cool at all.Spellcasters cast spells.
Other classes use abilities.
Making all (or most) abilities simply spells does two things- it makes all classes "spellcasters," and it makes spellcasting less cool.
In other words, it is the worst of both worlds. Simplifying things does not always make things better.