I mean, I've never seen him play in a competitive match, but his name has been floating around for multiple years in the global sphere of football. You've really never heard of him before?
To your original point, though, yeah, it sounds like he's a sublime footballer with absolutely zero goalscoring capability (or absolutely zero confidence, depending on how generous the Barca fan you're speaking to is). Spoke to a friend who is a big Barca guy and he likened him to Neto, just without Neto's seemingly endless enthusiasm.
I'll say that my current expectation based on what I've read is that he'll likely look like Adama Mk.2 early on. What happens after that is probably down to how Lage sets us up.