Add a language line:
Shieres speak Celestial, Infernal, and Draconic, but can communicate with almost any creature, thanks to their tongues ability.
The noviere should have the same language line as well. (This is the same as the bralani and the ghaele).
Add: "A shiere’s natural weapons, as well as any weapons it wields, are treated as chaotic-aligned and good-aligned for the purpose of overcoming damage reduction."
CR 10? LA +10? These are what the firre has, and they have the same number of hit points and have relatively comparable power levels.