The Focal point feature is very questionable – it promotes uploading uncropped and thus unoptimized images. Cover block still does not support responsive or adaptive images.

You can even see the issue in gif that you posted in this post – end user will have to download very tall and heavy image just to see bottom 20%.

Sure, it’s nice visually and it’s easy for site administrator to define focal point, but end user on low-end mobile network will suffer because of this.