Ear Worm: The Trolls have Saturday Night Fever stuck in their heads the whole movie.
Evil Is Cool: Both the Queen and the Huntsman are extraordinarily awesome.
Evil Is Sexy: Wolf, at least in the sense that for much of the miniseries he is technically a bad guy, or at least his allegiance is unclear.
Freud Was Right: Wolf's tail. The scene in the beanstalk forest, where he practically dares Virginia to touch it, she asks why he keeps it hidden, and especially the positively orgasmic look on his face when she brushes against the fur rather than with it, is extremely Freudian in nature. In a bizarre twist, however, the size of his tail apparently changes due to the time of the month, suggesting a connection to the female menstrual cycle. (Werewolves, after all, are tied to the typically feminine moon...) The fact it is hanging out of his pants following his 'hide-and-seek' in the forest with Virginia near Wendell's castle, and that this lets Tony disapprovingly know what they were up to, doesn't help.
Squick: At one point, the Queen tells Fake!Wendell if he follows her instructions, he can "have any bitch in town". Punny, but her implication is that he can and will sleep with a female dog.
Tastes Like Diabetes: Largely avoided, which is an exceptional feat for a 10-hour miniseries about fairy tales. But in certain places, the sappiness factor was cranked Up to Eleven. See also: Hearts and butterflies swarming through the air in Kissing Town under a pink, heart-shaped moon. Insulin, STAT. Add in the literal Love Is in the Air, most exemplified by the massive pink heart which appears over Wolf and Virginia's head as they share their first kiss, and the little Cupid girl skipping through the streets dispensing fortunes, and... yeah. Then there's the singing ring... Sort of Played for Laughs, mind.
Tear Jerker: The death of the Queen. Also, some of Virginia's speeches about her mother.
What an Idiot!: Tony's incredible Genre Blindness when it comes to the magic wishing bean. His first wish, maybe, could be excused if for some reason he didn't know about the Literal Genie trope, but once he learned Murray and his family would be indulging in Literal Ass Kissing, surely he would have known better than to ask for a "neverending" supply of beer or something that would clean "everything"--not to mention that last wish was absolutely redundant since he already had the Murrays to clean for him. And after these experiences he certainly should have known better than to ask for money without specifying its source, or ask to get free of the police car without specifying "safely" (or also asking to be freed of his cuffs!). By the time the last wish rolls around where he even manages to screw up the one useful wish out of the bunch by asking for the ability to hear Wendell only for himself instead of saying "we", he seems pretty hopeless.
What Do You Mean It's Not for Kids?: One might make the argument that kids would enjoy this too, and it just has a lot of Parental Bonus, but I expect parents would object to one scene in particular: Virginia discovers Wolf has a tail. In response to her surprise, he remarks, "You have succulent breasts, but I don't go on about them all the time, do I?" He then asks her to touch it, saying, "Why don't you give it a stroke?", followed by Wolf rather enjoying the experience.
The Troll King's children are also blatant drug users, seen in one scene preparing to roll and smoke "dwarf moss" (after one of them asking the others if they had any "magic mushrooms"); one of them comments that the last time she took it, she "saw fairies" for three days.
The miniseries as a whole has quite a bit of darkness, which a parent might not expect, unless they were familiar with the original Grimm's fairy tales.