Angry Grimace
Two cannibals are eating a clown. One turns to the other and says "does something taste funny to you?"
Well... yes and no. Leaking means a) people get worked up about stuff too early, so the hype cycle gets bumpy and b) WotC can't control what people know so misinformation or confusion can run rampant.
In this particular case, a) definitely applies (and they're gonna be pissed about that) but I'm not sure about b). My guess is still that these leaked so early because they were intended as an early preview of the set for a few weeks from now. Showing off Kozilek and the Wastes gives us all the info we need to make pretty strong predictions about the mechanic, and it shows us a splashy marquee card using it so people get excited about the potential -- you can see from people pissed at BFZ perking their ears up a little that this is a pretty good card to promote the set.
Yeah, not having interesting stuff is definitely not BFZ's problem, it actually has a ton of interesting stuff. The (tightly related) problems are basically 1) it has a fundamental inspiration problem that led to weird results with the Eldrazi, 2) design went late and late designs that need to be salvaged by development are always bad sets, therefore 3) it's kind of an incoherent hot mess, especially next to something elegant like Khans.
As a general rule, I'd say:
- Enfranchised players compare sets to each other, casual players judge them in a vacuum
- Enfranchised players care more about the set as a whole, casual players care more about the quality of the coolest standalone cards they can get
- Enfranchised players care about limited, casual players don't
The biggest issues with BFZ all fall squarely in the enfranchised side of this list.
Yeah, don't let that make it sound like I'm endorsing BFZ: it's an atrocious set by any reasonable metric. The feeling that the cards themselves don't do anything just comes from being compared to busier, more coherent sets in both limited and Standard.