That seems to be what I've noticed. I haven't played it yet, I traded systems with my brother and he's been playing it regularly since it came out. I wasn't really following the press stuff, but he seemed to know what he was getting, ie: no real narrative, or no storytelling, etc. Just flying around and exploring, and that seems like enough of a hook for him because he hasn't gotten bored yet.
I'd be interested to see what this game looks like a year from now, with a couple of updates and maybe even paid DLC? I have no reason to think it'll become something crazy, not some neo-Mass Effect or anything. But, just adding more stuff, which seems to be the common complaint, could all go a long way for most.