Part of the problem is of WOTCs own making, of course
Certainly not the best Jace ever printed, but Jace, Unraveler of Secrets is still a pretty great planeswalker
(Though thats definitely part of it.) While comparisons to Magic: The Gathering are easy - there are a number of keywords with specific in-game effects, cards battle using two key values for their attack strength and health, and you can gradually play bigger cards as you build up your stock of in-game resource - Lorcana doesnt just whack a set of Mickey Mouse ears on the veteran TCG
Emergency graveyard removal at this cost and speed is great
Endestructible We only make a handful of cards with indestructible because it can be so game-altering, but when you find yourself playing with them, they can make a huge difference
Using Sabins Suplex technique on the Phantom Train boss results in one of the games most unintentionally hilarious moments, as he lifts a train into the air and slams it down