When Planeswalkers were released, in Lorwyn, Wizards needed to dedicate themselves, over the course of sets, to creating efficient answers for them in addition to counterspells
After going harder into the graveyard-stocking plan, adding better reanimation (Reanimate, Living Death, and Animate Dead) is another good way to up the power
If youre evoking Solitude most of the time, then its a lot less powerful than the other removal options in the format like Swords to Plowshares and Prismatic Ending
According to the game publisher, Lorcana is the most ambitious project theyve ever done, with the largest investment and a multi-year rollout campaign for Lorcana
The challenge I see is more in assembling it: those commons are definitely strong, but only Intrepid Rabbit actually helps the game plan of generating additional bodies, and other cards which make tokens or help you draw more creature cards are a lot harder to come by