On the Ruby gem, we've added the method #lqip_data_url, which lets you access the SVG blurred up version of your images, like so:
For more details on what you can do, please have a look at this blog post.
On the Plugin SDK, we've added a new method plugin.disableField(...pathChunks, disable) that will let you disable a field so that the editors will be prevented to make changes.