This seems to be the real problem, while his focus on game mechanics is commendable all seems to be in the function of balance for the sake of balance.
This is bullshit, he gave explanation for his every decision on P:E
And people facepalmed harder and harder at every new explanation.
and none of them was "because balance, full stop". He pursues balance because he is trying to make every option that his game offers viable which is perfectly reasonable goal.
It isn't, viable can be acceptable as in different classes can approach the game in different and still effective ways, instead we have mages slamming people with grimoires as the final result of all the babbling about viability.
What is the use of an option that is clearly inferior, especially if you don't have enough information to recognize it as such while making a decision?
So we will have options that only differ in flavor, don't be mistaken, having everything equal will just meant that a warrior could do what a mage does and vice versa.
I think that problem with his approach is that most "imbalances" in RPGs came from area, encounter and quest design instead of ruleset itself (although usually it has its problems). It doesn't matter if he designs a perfect system if it isn't utilized properly in other areas of design.
And you nailed his worst mistake, design should come first, being anal about mechanics doesn't bode well in my opinion.
I get a strong nerd vibe from Sawyer, he will state his opinion because he have arguments for it without any thought how it will be received and without any attempts to sugarcoat it.
And people can find said arguments unconvincing and tell it openly, deal with it.
A lot of people mistake this kind of behavior for arrogance instead of lack of social skills, although I come to appreciate it a lot because of all the bullshit that is required in human communication. I don't think that anybody can argue that "problems" he identified in IE games are areas that can be improved (although his solutions aren't always good), but because of his attitude this is mistaken for arrogance and attacks on whole games that people love.
Oh look, the nostalgia goggles argument to disregard criticism, the novelty.
This coupled with constant trolling from Roguey produces a lot of unproductive arguments where people attack him because irrelevant bullshit like what games he plays or misinterpreting his arguments like "balance for the sake of balance".
Oh look, the it's just all trolling and personal attacks argument to shrug off criticism, please, fuck yourself, I never attacked him for his political views and lifestyle or whatever.
And this is a shame because although I disagree with a lot of his solutions I think that at least it can produce a good conversations about RPGs but instead we have 671 pages most of which are of Roguey's trolling.
And what this has to do with me?
Besides, I find Codex discussions on the subject much more interesting than Sawyer's pet peeves.