Not sure why you'd need to be biased to determine they came to a reasonable business conclusion. Developing another large-scale MMO when you're already running the most popular MMORPG in the world seems like a waste of time and resources to me. At best you end up cannibalizing your current audience.
Just for the sake of full disclosure. Meaning that anything I say in regard to Blizzard is in the light that I find them a soulless, stagnant, un-creative company whose only interest is developing better Skinner Boxes so that they can create gameplay to milk subscriptions and whatnot. No guarantee that this will all be rational all the time, but I sincerely wish Blizzard would just go out of business.
So, yeah, full disclosure.
Though I'll probably be dead before Blizzard comes up with a new IP.
I remember pointing out years ago that Blizzard hadn't created a genuinely new IP and someone name-dropped Titan as a counter. Welp, now what?
I think what ticks me off is they're hiding behind the "Passion" and yadda yadda not being there, but it's so easy to see the calculation behind the decision. If they had presented it as a business decision that's one thing, but they're pretending like it's some great artistic coup.