As you get more experienced, you can add new Lorcana cards to a starter deck or make your own for a better strategy
there's no denying that
The foil cards are cards not found in the main set (yes, above and beyond the 1,694 already in there), making the Draft experience even more repeatable
I do sometimes run them in archetypes like cantrips or Spellslinger and maybe one or two here and there
Xenagos, God of Revels Xenagos, God of Revels was one card in the two-card combo with Worldspine Wurm in the Izzet Indomitable Creativity decks that won Reid Duke the Pioneer format Pro Tour Phyrexia
If you've already got a lot of cards from The First Chapter, apart from the guaranteed foils in the 2 decks, it might be more cost-effective to put your money towards boosters, unless you're looking to pick up the cards from either of the starter sets quickly, then the fixed nature of the decks will get you those quicker than randomized boosters