I don't think leveling complexity is a necessity.
Some things, like combat or certain skills, can be quite easy to model with simple mechanics.
Other things, like reality warping spell or psionic effects might require a bit more creativity, and even novel mechanics.
There is no compelling reason to overcomplicate combat mechanics to match the spell mechanics, or oversimplify spell mechanics to match combat mechanics. They're 2 (potentially) discrete subsystems within an RPG.
If you can find a mechanic that works equally well for both, good on ya!
IMHO, 4Ed doesn't get there.
I'm there with you 100%, S'mon.
I have no problem playing dumb or smart fighters ("Og" or Ulysses, dumb or smart rogues (a thug or Grey Mouser)...but a Wizard ought to be intelligent.
Unwise (low Wis)? Quite possibly, but definitely a powerful intellect.
You want a dumb arcanist, play a Sorcerer.
Some things, like combat or certain skills, can be quite easy to model with simple mechanics.
Other things, like reality warping spell or psionic effects might require a bit more creativity, and even novel mechanics.
There is no compelling reason to overcomplicate combat mechanics to match the spell mechanics, or oversimplify spell mechanics to match combat mechanics. They're 2 (potentially) discrete subsystems within an RPG.
If you can find a mechanic that works equally well for both, good on ya!
IMHO, 4Ed doesn't get there.
On the main topic, no. Complexity should not vary across classes, because then you have crap like "Sorry, Dave, but you're not smart enough to play the wizard, since it's so complex" or "I don't play fighters, because they aren't the smart person's class."
I like that crap. I don't want a low-IQ or lazy player playing a Wizard (though I do want them to able to play the game & have a good time); I like my Wiz players to be studious types like the class archetype. For the others there's Sorcerer. Likewise I'm smart but I like to be able to play Fighters (or Barbarians) and put my brain in neutral (I used to like playing 1e Elf Fighter-Mage-Thiefs back in high school, but these days I much prefer a simple character).
I'm there with you 100%, S'mon.
I have no problem playing dumb or smart fighters ("Og" or Ulysses, dumb or smart rogues (a thug or Grey Mouser)...but a Wizard ought to be intelligent.
Unwise (low Wis)? Quite possibly, but definitely a powerful intellect.
You want a dumb arcanist, play a Sorcerer.