E.g. the last update removed right click -> open image, which I used all the time to view images in full screen. Now there's only an option to open the image in a new tab, which requires additional clicks to achieve the same thing.

Plus clicking the original "Open image" with middle mouse button (or invoking with alt+enter, IIRC) always did exactly what new command does, opened image in new tab.

New command apparently lacks alternative usage forcing current tab, but still opens image in new window instead of tab with Ctrl modifier. (Maybe it would be possible to plead for re-introduction of similar modifier?)

At least we can still drag/n/drop plain images to the Tab bar.

Indeed a bad change considering you could open an image to new tab with middle-click but now there's no way to open in current tab.