He's not the best writer. The point he meant to get across is that that's a nitpick, not a huge problem, but he spends several paragraphs explaining the problem and only a few sentences explaining that it's just a minor nitpick and overall the experience is good. Totally out of proportion, leading readers to weight the bad more than he intended.
Key phrases:
> In short: It’s fast. Stable. And generally a pleasure to use.
> In fact, this is my only big gripe with the Unity interface. And it’s not a big one. I’m nit-picking here.