Galaxy S5 also has the same Camera App issue since the Lollipop install. Lollipop affected the App camera focus, also when I open the camera app the phone gets hot then does a massive battery drain. I downloaded 2 other Free Camera Apps from Google Play Store that were highly rated, Camu, and Google Camera. Both work great, very crisp focus, and both have some great features.
I haven't removed the stock app, but I haven't used it since installing the other 2.