Warp contributes to this phenomenon, and Ill tell you why
He gets all the advantages of being a Hero from Ling, Anna, and Phil, plus he gives other character's extra lore when he challenges and banishes opposing characters
According to EDHRec data these are two of the 10 most popular Commander archetypes overall, so theres a good chance you play at least one of them
I think they could stand to be just the slightest bit more cohesively constructed, but whether you're new to Lorcana or just excited about the expansion, these are exactly what you want a starter deck to be.
This set looks, on paper, like a combination of Khans of Tarkir and Dragons of Tarkir
The power level of a card in gameplay can also influence its value