Yeah, Uncharted 4 was done by some studio called Iron Galaxy. I think they also did the PC ports for the Batman Arkham series. I tried searching for more info about the PC version of TLoU, but I can't find any mention of who's porting it.I'm talking about the PC ports. The one for Uncharted 4 wasn't handled by NG, from what I remember. And it had some issues. But I never stayed too much with that. Kind of lost steam. I only read about some issues in various player reports.
So I expect the PC port of Last of Us will likely also be handled by the same a different team.
Anyway, let's just hope it's solid.