This has been discussed at length
here. To summarize...
1. There are plenty of ways to configure a Standard view for this preview/display use case. The attached screen shot is one example. It won't be a full screen display of images with transitions, but it allows for rotation, cropping and other edit adjustments, rating and the setting of any other tags. Not all functions are available in all views, but you can choose the one that's most appropriate and modify that as needed (e.g., view the tag window to set a rating).
2. If Display View is preferred, rotation, rating and deletion can be done with keyboard shortcuts (which can also be invoked with a remote). This is the type of control appropriate to Display View. Even if there were buttons on the Player bar, using the keyboard or remote is less disruptive of the viewing experience.
3. The program is complicated enough without confusing matters by trying to make a view designed for playing media also function as a previewer that can handle adjustments and tagging. Much has been made of the observation other programs do this. They don't. They're either equivalent to Standard View, or they have a separate display or slide show view which doesn't allow any adjustments at all.