Why aren't these spells rituals?

[cthulhu42]

Eh, that might work.
But you never answered my first point:
If you're going to make ritual casters even better, why would anyone play anything else?

Because rpg's aren't all about power. People play them for all sorts of different reasons. Most people tend to have an archetype they gravitate toward. I've been playing since 1983 and I've never played a cleric. You could make cleric's the most powerful class in the game and I'd still have no desire to play one. I'd bet a paycheck that I could make every single spell a ritual AND do away with concentration, and I'd still only have one player at my table want to play a wizard.