Alright, I have a few questions on this. Take note that these questions come from a person that's actually read official translated versions of the literature you are referencing (though my memory of it is no longer as fresh), and I mean no antagonism whatsoever, so please bear with a few moments of my bluntness, and forgive my any instances for being unable to supress my spitefulness.
Probably the biggest elephant in the room at a glance in terms of Phantasms is your Squirehood Phantasm. You do realize that Sancho followed Don Quixote followed him out of anything but loyalty for most of the story, and no one but him ended up being loyal in the end, right (that also had issues)? Sancho was, in all, a foolish, uneducated, illiterate man (who somehow takes pride in it) who followed Don Quixote as he was promised a handsome reward (when he didn't even know what it was, so Don Quixote could've promised him useless stuff and Sancho would've thought the same as he doesn't know what words are) and his family wanted it too. He did it out of pure greed and desire but is patient for the reward and he does question, go against, and deceive Don Quixote in several instances of their travels. The whole idea of Sancho was "the trusty sidekick that existed because every good hero needs one", but your depiction of Don Quixote being able to garner loyalty and grant power in such a way is just wrong. If anything, people who acquiesced to Don Quixote did it out of the context of "fuck it, this guy's too annoying, let's lie to him so he'll gtfo". People burned his books that made him insane and said wizards burned them and lots of other instances. Don Quixote garnered anything but loyalty, and Sancho was the one that halted the maddened adventures in the end.
Of course, you could argue that you're doing this under the context of Don Quixote living his illusionary life and these powers embody what he sees alone, but that's basically the equivalent of turning your thoughts into reality, which is in my personal opinion, a heavy no-no for stuff like this, at least in this kind of phantasm in particular. In fact, I'd detract from my personal statement and say that this "depiction of a world you only see and applying it to reality and others around it" is probably the most conspicuous issue I'm seeing here.
Even then, some of your Phantasms and their applications don't even make full sense and are conflicted in a variety of ways. Firstly, what do some of these Phantasms and skills aim to serve in the battlefield? What does the pioneering in literature help in battle prowess and other important things? Even then, why is this credited to him? He didn't pioneer literature, the author did by writing about him, that doesn't make Don Quixote the creator of it. It should be credited to the author, who depicted the character, and it's not like it serves a particular purpose rather than being a fancy title. Canonically, servants cannot form contracts with other servants, so the imbuement aspect of your Squirehood Phantasm is questionable. The practicality of the potion Phantasm is also questionable; if you're to faint for an hour after drinking it, how is that going to help you in battle rather than speed up your death when clashes occur?
Your depiction of Don Quixote has two different personalities, a sober one and one that is "prone to acts of tomfoolery and stupidity." That's quite an understatement for who he really is, considering he's living in a fully delusional world where he only sees things through his eyes. He snapped because he decided he would call his neighbour the best girl in the world and read too much chivalrous literature, and the story's whole theme centers on his seemingly tragicomic crusade of overcoming the nihilism that is the lack of literary elements depicted in the stuff he reads in life. Another thing that isn't explained is the line between his sober and insane side. What triggers and allows him to alter between the two? This is even more relevant especially in tandem with your EX Phantasm, which, apart from being obviously OP, also relies on his current state of mind. If he had the ability to swap minds easily he could easily just spam this EX and even if it was hard, this instance of your EX Phantasm shouldn't be acceptable. Surpressing Noble Phantasms, reducing parameters, and magic? Anyone can tell you that's stupid and I'm pretty sure a combination like this doesn't exist canonically, though forgive me if I'm wrong. Losing something that's irrelevant to battle and another god-playing Phantasm isn't too fair of a trade, either.
Your depiction of Slayer of Windmills also is very generalized and vague. Try to make more action occur when explaining your Phantasms. There are many ways to fight a windmill, we want to know how, not the fact that you can do it. Also, with apologies if saying this a bit stupid, but I think most of us would also prefer a minimal amount of NPs rather than a large amount of them.
The OP has requested that all characters should have a depiction as close to the original as possible, and simply put, your depiction is lacking in that department. It's not a lost cause, but try to dig a little deeper for things like this.