My problem with Sawyer is not that he criticizes things. Is that he criticizes things I like:
Do you want him to hold your hand while he tenderly looks into your eyes and says he likes everything you like? Seriously though, "he has different opinions than mine" is about as bad as you can get with an argument. Sure, you can be concerned that things you liked about old d&d game will not be implemented into a game that was promised to follow the legacy of said games but as long as the guy said that he won't be using any ad&d system the point is moot.
Basically i care what he thinks about ad&d 4 as much as i care what he thinks about unicorns or world peace; what i DOi care about is what system he can come up with for P:E. And so far from what he said that you actually touched upon:
1. Stamina system makes sense and can work if implemented correctly - see Wizardry 8 which (imho) did it right and made for a pretty interesting tactical decisions. And having non-mage classes actually have a resource of their own is actually i'm fully behind. And no, stamina is not health.
2. Cooldowns can or can't work depending on how the system is made up as a whole. The point is (again imo) resource management within a fight and outside of it, having to rest to get your
cd's abilities back can be as trivial and unmeaningful if poorly implemented as having cd's in the first place. Again you have the freedom to hate/fear everything that seems to be outside the realm of your favourite game and seems to fall in line more with most mediocre/shitty games of today, at the end of the day mechanics are as good as they're implemented and i'd trust a good designer to look at the big picture more than have their vision clouded by preconceptions (thank god you're not a designer).
3. Having to actively play classes is bad how? I don't know if i don't understand this properly or what, but you saying that sawyer "hates" mage duels but at the same time wants people to actually manage their classes more instead of letting their fighters chase around like headless chickens while you focus 90% of your time on your mages makes no sense to me.
4. As far as i know he actually advocated a lot for small inventory of sorts, at least equiped inventory. Iirc he said that you're very limited BY INVENTORY in how many weapons you carry on you so you can't just have all weapon types on you and just switch to whatever counters your opponents' armor type.
5. He's never said anything about aggro mechanics in P:E at all, in fact most of what i've seen from him argued against those.
That's all i can see in your post that's P:E-related and not horribly taken out of context or just shit you're saying cause "he criticizes things I like"