This is awesome!!!
However, there is one major area where this plugin needs to improve, if a page is not using any LearnDash widgets, then the Learndash assets should not be loaded. (same for all of the widgets supplied by your plugin).
Looking at this page:
https://widgetkit.themesgrove.com/nutritionist/

It has 125 requests. When I look through the source tree on tools.pingdom.com it looks like it is loading the assets for every widget the plugin has, regardless of whether they are used on the page.

If this can be corrected I would be interested.