I tested #11 patch on simplytest.me
Result looks bit weird to me.
As you can ...

I tested #11 patch on simplytest.me
Result looks bit weird to me.
As you can see in 2469553-Node-creation-form.png there are radio buttons for the field.
However, for views' filter criteria field setting i can see select list instead of radio buttons 2469553-views-filter-criteria-form.png
May be others should also review it.

Update:
While testing this field, I kept field type as "List (text)" and from "Manage form display" I changed widget to "Checkboxes/Radio buttons"