Wow! That's very fun to learn about, also yes I can imagine it having been scrapped for the simplicity.
Also also, other than the to be alternate forms; Husian Zorua and Zoroark's Normal/Ghost, everything seems in order!
I was a bit confused at Psychic/Ghost and Dragon/Ice, being that Lunala and Kyurem has them respectivly.
But I suppose, it is really only used by other forms otherwise.
Especially Kyurem, being the only Dragon/Ice, even in their other forms.