These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Cliché Storm: The movie plays like your typical horror-themed arcade game. Two players with loads of guns and ammo, blasting monsters (witches) into ludicrous gibs, saving the hostage villagers (children), along with a Big Bad final boss. And the adventure continues. It also helps that the heroes struggle against powerful witches, much like how a stage boss takes a lot of punishment before getting destroyed.
Muriel setting Hansel and Gretel's mother and father to be burnt at the stake and be hanged respectively, despite being completely innocent, especially since the former is a white, and therefore benign witch; in order to separate Gretel from them in order to get her heart.
Berringer crosses it when he murders the mayor in front of the townspeople.
Narm: The giggling, grunting, and rasping from the Horned Witch.
Visual Effects of Awesome: The film employs a combination of digital and makeup effects to bring the witches to life. Edward is a completely practical creation.
What The Hell Casting Agency: Hansel and Gretel look to have only a couple of years' difference between them as children. Flashforward and... well, Jeremy Renner is 15 years older than Gemma Arterton and looks it.
More importantly, this is a completely non-serious movie with shotguns, hideous witches, and ridiculous amounts of blood and gibs. Why didn't anyone get Bruce Campbell for this film?
They missed an opportunity to show Sheriff Berringer being present at the burning of Adrianna.