If you look at Divinity:OS, Pillars of Eternity, STASIS and other kickstarters, they don't go wild into promises like inXile does. PoE is a spiritual successor to Infinity Engine games, and that's it; Sawyer doesn't go around saying it will blow Baldur's Gate 2 out of the water.
See, this is where you're being subjective. Pillars of Eternity is promising A LOT and has caused, is causing, and will cause MASSIVE butthurt. Sawyer is on record saying that he's going to design a system that blows AD&D out of the water and that BG2 sucks, FFS.
Why do you not notice this about PoE but do notice about Wasteland 2? Check your biases.
Larian have promised quite a lot with D:OS, as well (spiritual successor to/highly inspired by Ultima 7, high level of interactivity in the world, alternative quest solutions, emergent gameplay, etc.). Might be that they have done so in a less sensationalistic manner, or their ongoing record of bro-ness is helping. Or simply because it gets far less attention on the Codex.
But to me it seems as if ultimately their project was never as charged with peoples' expectations as Wasteland 2.
Could it be that for a game like Wasteland 2, which is both the direct and spiritual successor to two very important and much beloved franchises, people simply project too much of their expectations and hopes unto it?
While games that come up with something new, like POE or D:OS do, largely evade that pitfall?