I liked the episode, it was nice to see kion and kiara working together! And Nala getting a chance to be a parent. Though I agree with panpardus that the search to find Nala didn't feel urgent enough. I think maybe the song should've taken place there and more dramatic instead of Bunga being silly early in the episode. Or maybe the viewer shouldn't have been let in on the secret that Nala was fine, just hiding. It was all very predictable. Also, there was some more of Kiara's inconsistencies with the second movie in this episode, but at this point, I wouldn't expect anything different. I knock on this show a lot, but I really did enjoy the episode, I'm probably gonna rewatch it.
Also, I wonder if udugu is a tradition that Simba and Nala just made up, because Simba knows the importance of getting along with siblings with Scar, or if Rafiki told them about it. There's no way Simba got to experience Udugu with his presumably being an only child and running away as a cub.