It's not a matter of filtering language, it's just asking people from GAF to not be homophobic/racist and explain the language in chat as "it's fun". It's not Xbox Live, just be a little more polite.
About Zyra, her abilities sound interesting but kind of hard to figure out and execute at max level, sort of like Draven and Jayce. I wonder if any roles besides jungle (maybe support) are viable, or if a sort of Heimerdinger mid push strategy would work.
I liked the preview art better than the final art, but I guess Riot can't show bare plantbutt.