The plugin shows the full-size image instead of the thumbnail. It could be great if the user could specify the thumbnail size.

https://www.ads-software.com/extend/plugins/featured-post-type-widget/

The plugin works fine, except for the taxonomy aspect. Either specifying a category or a tag taxonomy is intuitive enough in the widget, but instead of displaying a particular post, the plugin displays this message on the website:

Yes, we have no taxonomies, or posts, today.

As a suggestion also, it would be great of the plugin used standard widget structure so that widget styles will translate directly to this widget.