Once you realize you can come up with a fictional character that pokes holes in any system then those examples become meaningless to you. Seriously, you can do what you just did to any system. I could make a character that uses my suggested level scaling and show D&D as it is can't accommodate that character.
The crucial question is which system is more typical of adventurers in general. That's the best we are going to do (at least with a "fair" character creation method). I tend to think the typical adventurers get better at basic adventuring tasks. Do you disagree? Do you think Tim the Wizard is representative of the typical adventurer, or even the typical wizard?
(by the way I'm all for a tacking on a module to my proposed one that lets you make some skills not scale with level in exchange for extra scaling in the same number. This helps with character concepts a lot).
Hi, my name is Barry the Fighter!
That is correct, you heard me right, Barry the Fighter.
I wear platemail, and tons of it. Not just your average platemail, no, I wear what I like to call, "Double Plate!"
I am not good in stealthy situations because I wont dare part with my double plate.
So, because of this, I get left behind on sneaking missions and am told to wait outside, or at least wait for the signal.
I'm also pretty bashful & shy, and don't talk to people much.
Last time I talked to somebody, they raised prices on us at the bar!
So, because of this little mishap, I let the Bard take care of all the conversation work.
One day I met this Wizard, his name was Tim, he was a real nice fella.
Not a lick of muscle on that boy, I tell ya!
Tim traded me some potions for some of my jerky.
I make real great jerky!
Oh, one other thing before I go.
Since I don't part with my double plate, I also can't tumble worth crap, squeeze through tight spaces, or balance really well on slippery ice.
Did I mention I love my double plate?!?
And as you guessed, Barry was a simpleton with a 25 AC just from his double plate.
Barry had the envy of all the other fighters in the form of protection, but not in burden, as double plate weighed double the weight!