That context changes the experience in ways that are hard to quantify but easy to feel
Many less enfranchised players reported they were a bit lost and had trouble connecting with the set. You can probably guess where I'm going with this, but since third's the charm, here are one highlight and one lesson learned from Unfinity: Some players appreciated that over half of the cards were Eternal legal
note that seven of them (Pikachu, Miraidon, Koraidon, Hydreigon, Roaring Moon, Dragonite and Drampa) are holo foil cards
Depending on how wide and large your tokens are, this could easily end the game by attacking all out, with your opponents not having any blockers remaining
When everything comes together, Sazh's Chocobo grows to enormous proportions, Earthbender Ascension piles on additional +1/+1 counters, and Mightform Harmonizer threatens lethal attacks seemingly out of nowhere