Abominable (2019) has fluffiness to spare, but not much else.

With impeccable timing, Dreamworks has released its Sinophilic family animation “Abominable” at a time when there’s surely no risk of controversy, right? The movie offers a familiar fable of plucky teenage independence, friendship and environmental issues with an edge as soft and fluffy as its title character. Its lightweight nature wouldn’t be so bad if…