Y'know, I used to think that Enchantment was kind of a silly Wizard specialization, since I didn't think their school perks really matched up against some of the others like Evocation or Transmutation... But rereading and reconsidering things, I believe I was grossly mistaken.
Hypnotic gaze is honestly a bit ridiculous. Yes, you need to be standing next to the creature in order for it to work, but it has a single save and if that fails the wizard can simply continue the effect as long as they like, and is usable once per long rest per creature. You can still use it (or try to) on everyone you meet over the course of a day if you so wish, you just can't use it twice on the same schlub without taking a snooze between attempts. That's big.
So, nevermind the point that you can just hypnotize someone and let a buddy tie them up for a more permanent incapacitation (or, heck, even just let the barbarian freely put them in a headlock, since it's not "causing damage"), but since the subject is "charmed" you gain advantage on any social interactions with them while you've got them hypnotized. That's just a crazy interrogation/suggestion tool.
Instinctive Charm at 6th level lets you use your reaction to redirect an attack against you if the attacker fails a Wisdom save against your spell save DC. If the attacker does make the save and the attack does go through, then you can't use that ability on that attacker again until after a long rest... You can still use it on any other attacker, and if you do redirect the attack due to them failing the save, then you can just keep using it on them until they finally manage to slip one past your magical defenses! This is also pretty crazy when you think about it, since not only are you saving your squishy self from evil monster attacks, but you're also potentially turning those attacks around and hitting more enemies with them, basically for free (reactions are quite versatile though).
Then we've got that whammy at 10th level, Split Enchantment... "When you cast an enchantment spell of 1st level or higher that targets only one creature, you can have it target a second creature".
Ignoring the obvious munchkin bait that this line does not specify "target a second creature within range of the spell", realize for a moment that this means actually a fair bit more than "just" charm/dominate/hold/suggestion, which is already pretty dang useful...
No, the wording of the ability also means that it applies to Power Words. Or Feeblemind, if that's more your jam.
Alter Memories also opens itself up to some truly evil nefarious shit, but meh. We're already more than done by that point.