There are two acceptable solutions to this problem
Probably it will be the top mechanic to come out of the set
If you copy a double-faced creature card, the Spirit token wont be able to transform
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You could definitely tweak the list by running 3-4 copies of Bloodbraid Elf, a playset of Nissa, Voice of Zendikar as the only planeswalker in the deck (Maybe keeping a single Liliana, the Last Hope, Domri, Anarch of Bolas or even Grist, the Hunger Tide), and really focus on the +1/+1 Counters plan with Bloodhall Ooze
Making sure you've always got one generic mana open, continue your extra turn until the end of your second main phase