I read what the guy wrote, and what she said in response. Arenanet fucked this up bigtime and I expect a lot of devs there - especially their writers - will be looking at exit strategies. There are plenty of other game companies in Seattle. They will contact Arenanet employees and attempt to poach them.
Jessica Price wrote this long, nuanced article about the way to make the player feel they are participating in the world without breaking the way players project their own personality into their characters. In MMOs (I've worked on two) your character is an avatar; it's yourself in the virtual world. It's not like most games where you're operating an already defined character.
The guy (Deroir I think is his name) replied to this with a suggestion so insultingly simple it deserved scorn. He was polite, but it was a REALLY condescending response. Imagine you drive a truck on a really tricky route and write about all the things you contend with. You've been doing this successfully for years. Then someone says, politely, but meaning to educate you, "if you turned the wheel and used the gas at the same time, how about that?" That's a thing deserving only scorn.
She unloaded on him pretty hard, but it was the right way to nip that idiocy in the bud. If she hadn't most likely a whole bunch of other people would've chimed in with similar stupidity. Arenanet management immediately fired her, plus a colleague who had made a few mild comments in support of her.
Bottom line; your staff are the most important thing you have. If you throw talented long-time staff members to the wolves, you stand a good chance of wrecking your relationship with your staff. Everybody else will see that as ruthlessness and feel fear!
Personally I will now never even consider working with Arenanet's leadership and other devs I know are saying the same thing. That the guy has some sort of business relationship with Arenanet only makes it worse; Now every time the company signs a deal with someone the staff will wonder if that person will endanger their career. The game biz is cut-throat; a little self-inflicted wound can have major effects. Arenanet are probably going to suffer the consequences in an ugly way.