I'm beginning to find that pattern annoying. I think they really began to overuse it starting in Season 4
I think the show would be paced better if multiple plot lines were covered on most episodes.
The problem with that is the show become disjointed. Imagine if last week's episode and this one were cut together so that both plot lines took two shows to finish.
They're already meandering badly. I'll bet one shiny penny they are slow rolling towards the mid season break. They only got two more shows.