And the whole gross exaggeration of calling the math 'broken' doesn't do anything for your argument either. The math of the game was NEVER BROKEN, it worked fine. The purpose of it was to scale encounter difficulty and character potency through 30 levels and it did that quite well (though other things outside of the basic math didn't work out quite so well). PCs in epic have NEVER EVER had any problems hitting. If you actually take the time to go run an epic fight you will see that any even modestly competent party will mostly be hitting on 4's and 5's without expertise feats in actual practice. OK, so now they hit on 2's and 3's, big woopie!
There's nothing wrong with the factual assertion that with Expertise the math progresses evenly for all levels. The concept that it matters is thoroughly discredited. The notion that it 'fixed broken math' is simply derived from some abstract theorycraft understanding of the game that is totally disconnected from actual play experiences. Expertise isn't needed, never was needed, and that's the only relevant point to be made. So maybe you'll get a better reaction to your ideas sans the hyperbolic 'broken' adjective. Just sayin'.
I'd hazard a guess I have more epic play experience then you do (by an order of magnitude), having played 21-30 on two Bards, a Druid, a Cleric, a Warden, a Wizard, a Fighter, a Paladin, an Invoker, a Ranger, a Rogue, and two Sorcerer's. It does break the
intended math, no question about that. Whether that is "useless theorycraft" or not isn't relevant, except insofar as, hey, the people who develop the game agree the feat is mandatory to the point where they give it out free (people who
also have more epic play experience then you I would hazard to guess).
So, is the statement that PCs lose 1/2/3 per tier to hit factually correct? Yep. Is this a scaling issue with 4e's math? Yep. Was 4e intended to be so tightly balanced that +2/-2 was a big difference? Yep. Is -3 therefore a big difference? Yep. Is that broken relative to the design intentions? Yep. Does Expertise fix this? Yep. Is Expertise a scaling fix? Yep. Does something need to be broken to fixed? Yep.
No, I'm good, I'll stand over here with math and the developers of the game.
Also if you have an issue with NAD math being auto-hit you have an issue with expertise. You can't have an issue with one and not the other because they are out of whack for the exact same scaling reason (monsters get +1 to attack per level, PCs get 1/2 level+Enhance to defenses). The fact that you can even
say you have an issue with one but not the other is an indication you fundamentally don't understand the math being discussed.