This new UI that removes the colors from the icons in Power BI service is really awful. Many of our users are complaining about it. When you have a workspace with many different types of content, it is difficult to distinguish between all of them when they are all black and white.
This change went into effect here last month and then randomly went back to normal. We were disappointed to find it back again. Please consider putting colors back into the icons at least.
Users are also disappointed with losing the tab to filter to datasets/dataflows quickly.