Low base armour? I think you meant high armour. He's got the second highest level 1 armour in the game, right behind Rammus. His armour per level is nothing to scoff at, either.
Low base MS? I think you meant normal MS. He's got 340, which is right in the middle. (325-355)
Low base MR? I think you meant high MR. There are currently two different amounts of MR: 30, or 32.1 +1.25 per level. Darius has the higher one.
He's in the middle of the pack for health (which, to be fair, might be a little on the low side for bruisers).
'Very short range' is the same as 53 other champions, most melee champions have 125 range.
Now, this isn't to say that I think this buff is too much - actually, I think it's not a bad change (and I never play Darius). You're just wrong, and they just need to make his pull less reliable (you should be able to dash/flash away).