All of those complaints are pretty weak and easily mitigated by consistently strong work ethic and play. I find the Edler one especially silly. Some players just don't have the mentality to be tough-guys, regardless of their size, and I don't think there's anything wrong with that as long as they hold up their end of the bargain play-wise, personally. It's not like if Pettersson bulks up, I'm going to expect him to suddenly start fighting guys, otherwise I'd lose respect for him or something. That stuff has always struck me as primitive cave-man thinking, personally.
The only one legitimately comparable to Miller is Bieksa, IMO. I 100% rolled my eyes at every time he did something reckless/dumb while playing a lazy game and people went "At least somebody cares! What a fierce competitor/leader! Heart and soul guy!"
It was exactly the same thing. He was just prone to throwing an insecure hissy-fit more than anything. It's more pride/machismo/petulance than competitiveness.
Their mental fortitude actually seems very similar to me, now that it's been mentioned (far more-so than similarities between Kesler and Miller who only have a similar off-ice personality/demeanor-- Kesler being questionable on the ice because he "cares too much" is something that I actually buy). I suspect that they've both convinced themselves that they play their best when being very instinct-driven, taking a lot of low percentage chances, and accepting that they'll occasionally make really bad passes, as if it's just part of what needs to happen for them to be successful or something (as if they think their mojo will disappear if they tighten things up). Bieksa has basically said as much, while Miller is more speculation on my part.