Sacred Mesa gives you an extra engine for more, and Pegasus Refuge works well with the heavy drawpower this deck runs to make up for it's weak creature base, even if chucking a white card for a 1/1 flyer feels bad
Source: Magic: The Gathering/YouTube Magic: The Gathering Arena Released September 27, 2018 ESRB T for Teen // Blood and Gore, Mild Fantasy Violence Developer(s) Wizards of the Coast, Wizards Digital Games Studios Publisher(s) Wizards of the Coast Engine Unity Multiplayer Online Multiplayer Franchise Magic: The Gathering Platform(s) PC, Android, iOS Genre(s) Digital Card Game OpenCritic Rating Strong
What you should consider: This starter kit is not ideal for players who already know the basics of Magic: the Gathering
This drove up the cards price, as looping two copies of We Know the Way is effectively the decks win condition
I imagine they want to reduce the amount of credits one can collect with additional copies of Common and Uncommon cards, but this could also be achieved by simply reducing the amount of credits they provide (and cost, spending 100 Credits per Trainer card does not feel great)