Roots seem to be a stronger Soa clan
Lots of generally solid (7 powered, 4-5 damage) cards verses the 6-7 powered and more ability reliant Gheist.
Roots has more defensive cards (Yookie, Jeena, Arno, Flora) and more attack manipulation (Rico, Gertian, Jeto, Miken Moose) than GHEIST, so if they have Lou in Elo, encounter them will be like you play against Junkz, GHEIST and Pussy Cat at the same time.
But now using Roots become more and more difficult, UR give Yookie back, but take both Jeena and Gertian from us. So Roots now is not as heavily defensive as it used to.