I'd like to have

fromLeft :: forall a b. a -> Either a b -> a
fromRight ::  forall a b. b -> Either a b -> b

over the current partial

fromLeft :: Partial => forall a b. Either a b -> a
fromLeft :: Partial => forall a b. Either a b -> b

as typing either (const a) identity becomes old rather quickly and I need these functions much more frequently than their partial counterparts. I'm not sure how confusing it would be to define these functions differently in two modules in this package, but even if don't rename the old ones I think this would be a win.