Its a great way to immediately bring yourself up to speed and Amber & Emerald does so in a way thats slightly friendlier than the other Into the Inklands starter deck
Even looking only at Emerald cards, there are many characters that have strong benefits when they are first played, and this would allow you to play them again
Decks in these formats used fast mana like rituals and Ancient Tomb to get an early initiative permanent into play and start reaping the card advantage from the beginning of the game
Because Jorn has the rather unique ability to untap your Snow permanents when it attacks, many decks tend to move more to a Stax build
Namely, that this lets you counter a spell outright, and then gives you a resource to use on something
We're slowly but surely seeing a shift in precons adding more and more untapped duals: we've got filter lands like Cascade Bluffs, some reveal lands like Choked Estuary which while not amazing are still better than any tapped dual, and battlelands like Sunken Hollow