People calling it Spore 2.0 are full of rich, creamy shit and have no idea what they're talking about, inflated their own expectations of No Man's Sky through delusional and idiotic romanticisation, and/or have no fucking memory of Spore.
The thing with Spore is that it was marketed and presented as a more robust and ambitious project than what we actually got. A lot of this has to do with EA's fuckery and deconstruction of the original vision. But Spore is a very clear cut game of fans being told X and Y, being shown X and Y, and then X and Y being downgraded or in some cases outright gutted from the game upon release. It was still an immensely ambitious project that to this day I find impressive, but fuck me that game was butchered.
On the other hand No Man's Sky, low and behold, looks exactly like all the pre-release media we've seen. There's a video out there, I can't remember where, of Sean demonstrating decent chunks of unbroken gameplay. And it matches the leaked footage to a T.
Did people just imagine a game that didn't exist? How the fuck am I supposed to be sympathetic to that? Oh gosh you have to mine heaps of materials and use them to unlock and upgrade things. The landscapes are quite barren and the encounters are a bit dull. No fucking shit. It's not like all the pre-release media has demonstrated exactly all of this already long before the leak.
I swear some people were expecting Mass Effect on steroids.