If Kingdom Megs is an indication, there's probably a non-teeth gritting face. maaaybe a Beast Machines faceplated one.
I'm starting to wonder how much of that is legit dislike, or just something that has spread secondhand to the point it is an accepted truth. Kind of like how, for many years, Gundam X was said to be this horrible, near franchise destroying, abomination...but from western audiences that I know that have actually WATCHED IT, it's actually pretty solid. It just wasn't as successful as the prior, higher profile, series.Doesn't help that, to this day, Beast Machines still has a stigma in the greater fandom.
It's funny when the most show-accurate Beast Machines Megatron toy is the Happy Meal toy.