There'll be at least one new Zord before Season 2 ends.
What will it be? This troper's guess is a hydra. There will be more Gaia Rangers before the end.
The writer IS contemplating making Faye a full-time Ranger. The Gaia Rangers will obtain new weapons and powers based on their elements.
Guesses include a cyclone boomerang for Patrick, a hydro crossbow for Layla, a rock mace for Dirk, a lightning shield for Madilyn, and a double bladed sword for Drayden.