With such a large creature base, and with such a strong tribal presence, Soldiers have a ton of power
He can be in play by turn two with a little ramp, and while the food token from his +2 ability isn't that impactful, he's then sitting at six loyalty - and dealing with him is an utter nightmare
Consider that each dollar gets you 170 gems on Arena and youre looking at a base rate $100+ per Brawl deck , which is insane
With other Princess-specific cards like Wreck-It Ralph Admiral Underpants, Vanellope von Schweetz Sugar Rush Princess, Hans Noble Scoundrel, and Moana Of Motunui there is even more potential
As a creature deck its nice to be able to get our army a second lease on life, but we already have a bunch of reanimation effects