F2P means not being able to rely on something like having 0-star Assault SSR weapons, or 60% Assault main Eidolons.
But as I said, the difference is not big. Compared to running two Wind Disaster... uh, Bows, was it? And Quetzal from Eidolon Orbs, it's not a significant advantage. Still, I wouldn't call that F2P.