You might be noticing a lot of brown leaves and needles on your shrubs; some more on one side than the other. What you are witnessing is Winter Burn.
Not sure why they choose the word “burn”; maybe it was easier to comprehend than “Winter Transpiration”.
What has happened, and is happening at the moment, is the plant’s stems and branches are asking for water, but the roots are still frozen. If you need a visual aid put a straw in a glass of water and put both in the freezer for a couple hours; take them out and try and suck out the water.
Unfortunately, there is very little you can do now; the late fall was your window of opportunity. You can try trickling water at the base of the plant in hopes of thawing some of the ground around the roots, but it will not bring color back into what has already turned brown. But, I would not prune out the brown stuff just yet; some of the border line leaves might come back; some of the stems might sprout new leaves. So I would wait until around June; if it’s going to happen it will be by then, after that you can prune out the dead.
This coming fall give all your evergreens a good long drink before you put the hoses away, it will help them during times like this.