I like working with LR and it's the software product I use the most. It's a good piece of software and I never had any troubles working with it and I always was a happy user. (German keyboard layout on a Mac)
But in the new LR version the keyboard shortcuts to rotate images have been changed, unfortunately to the worse. From (Command+) and (Command+.) to (Command+<) & (Command+#). You did fix something that was not broken.
Here's what these new shortcuts do: 1) They only work for me when an image I have fully zoomed into an image. 2) The shortcut to rotate an image clockwise (Command+#) is the same as the one to zoom into an image (Seriously?! Did no one double check that before the release?). 3) In the previous LR version you could rotate images with the shortcuts in both directions without having to use two hands on the keyboard because the keys for both directions were right next to each other (, & .). Now the keys used for this are on the opposite ends of the keyboard (at least mine, which has a German layout).
I really hope you come up with an update to bring back the old shortcuts to rotate images.