I think it's improved, but far from perfect. NBC Sports in general was complete trash for the last 12 or so years before this one. Maybe Embersol's departure was the best thing that happened to NBC Sports.
On the flip side, BBC has probably created the template for GREAT Olympics coverage. Again, based on what I've heard. And as for what I've seen on YouTube, I would love to have some of those Brit announcers here. In the US, all we have are Arlo White, Ian Darke (the best in my opinion), and SOMETIMES Martin Tyler. All do soccer. Darke by the way has taken a few shots at NBC's tape delay strategy on Twitter.
My complaint with NBC's coverage... too many commercial breaks!!! Both on air and online!!!