Both of them do a good job of showing up the expansions new mechanics and key features, and after playing them I dont think a third one would have been necessary, especially because it would have just been another Ruby/Emerald like last time
Wizards might have avoided the divine when building Dominaria, but there was no way they could ever realize their vision for Theros without a proper pantheon
The Standard deck used Merfolk Looter and Magus of the Bazaar in this role, which could get between one and three cards in the graveyard on Turn 3
Not just the artwork or the Pokemon's name, but every tiny piece of text, every symbol, every marking
Part of that is due to the fact that as more cards get printed, and more of those get banned, then the list of banned cards obviously gets longer
Please do be gentle with cards, they are sprayed with a varnish to protect them but if they are scraped roughly the paint may chip