A bit of yeast flavor is common in green ciders espcially ones that are still cloudy as there is a lot of yeast still in sepension. The Isinglass will help this, but the best thing is to just give it time for the yeast to drop then, rack off of the lees.
The temp you fermented at is fine and you shouldn't have any off flavors in your final product. Welcome to cider side of things!
Primary: Ginger Beer
Kegged: UpstateMike's Caramel Apple Cider, Strawberry Graff
Bottled: Edwort's Apfelwein, Brandon O's Graff, More Graff, Spiced Graff, Ginger Beer
Up Next: Graham's English Cider