In my experience hanmi is often taught with feet wide apart:
And some teachers emphasize an a even deeper stance like shown here.
I know one teacher who likes having his feet "close together" in hanmi and just relaxes his knees instead of "going deep".
Does this so called "stance of heaven (and earth)" relate to things thought or taught concerning IS?
Our hamni stance is a natural step forward. This stance is very stable. After contact is made with uke and uke is relaxed
through...seeking the hamni stance again enhances balance which enhances the centered feeling or if you like IS.