Momir Variant - Spellbook Emblem
I really like the Momir Format. And I recognize your effort to spice it up by putting regular cards into it, although it didn't worked out and you had to remove that feature.
Maybe you can try another aproach by creating a Card that is used in MTGA only, with the following properties:
Name: Momirs Tome
CMC: 5 (just 5 generic mana, no colors)
Type: Legendary Artifact
Effect: If you would draw a card, conjure a Wasteland into your hand instead, then draft a Card from Momirs Tomes Spellbook.
You can use mana from Wastelands as though it were mana of any color.
and its Spellbook consists of all the cards in MTGA, that have a spellbook themselves, like "Cursebound Witch", "Xanders Wake", "Bladehold Cleaver" etc.
Then you could make a new Momir Format where your library and hand start as empty and both player get an Emblem that is the previously described card.
I bet people would like to play this format where you have still quite some randomness but still can make a bit of choice on what cards you draft.
And Most importantly: it would looke awesome if both player start the match with an empty library and hand