The main drawback is the reconfiguring cost, which is two generic mana plus two black mana for a total of four mana in addition to the two mana casting cost
There are two starter decks available for Disney Lorcana: Ursula's Return
Delney, Streetwise Lookout, a mythic mono-white legend from Murders at Karlov Manor, lets creatures with power 2 or less get in on the fun, doubling not only any 'enters' triggers they may have, but any triggered ability they possess
Just triggering the "4 mana or more" mode once is going to make this feel like a good play
The Soul Stone This is the really BIG money card of the set, and WotC knows it
It'll help you thin out your deck, while ensuring you never miss a land drop again