Sky_Demon_Order
One observation is that it feels like the typical fics that start in the first chapters to imagine a way to change the world with advances etc, too rushed and too impulsive, I think the last time I read the LN was 10 years ago, but still I remember that the precaution the Yotsubas have was too unjustified, if his own members do not grow rebellious, someone who is the own son of the main branch would have even less reason to grow rebellious, or perhaps from the beginning he would be treated so unfairly that he could only end up in rebellion? very illogical. The AI thing is not even so exaggerated in an era where you can create spells to counter it, my recommendation is to focus only on the personal, hes spell is so strong that you would only nerf it by distracting it with things that in cannon he no had another option due to his poor talent for others types of magics, another thing is that if he learns to control his emotions, it means that he learned to isolate them, which means that if they still force the emotional link with Miyuki, he would have no problem isolating it, so I hope you don't force that forced feeling just to give him an inconceivable weakness when he is already aware of the problem from the beginning, just have a natural siblings affections
I understand what you're saying, but still the alien thing doesn't apply because he's not external to the family so the fear is too unfounded and is used to force a narrative in the anime and LN, I don't take back the AI thing because in an advanced magic society where they even modify their brain for greater capacity does not make sense, if CADs have to be made to adapt to each individual it would be even more useless, if the ability to see magic is so rare and if it were so easy with a "program" wouldn't they have done it already? If they modify genes to strengthen every part of them, AI that simply offers greater information processing capacity or some personal assistant is not the big thing you want to make it out to be (in a world with magic).
Sky_Demon_Order:yes but AI even if not used in spells which true can disable electrical devices BUT AI has such a broad application that you don't even need to use it to fight it would even be stupid. also yotsuba are a clan of magicians for them tatsuya is like a cripple a dog which they are afraid of and what do you do when you are afraid of something someone and it can't counterattack you attack it bully it etc... I am sure that at first it wasn't as bad but beacuse tatsuya didn't respond it only escalated and it's understandable as he have no emotion towards himself he didn't feel the need to return the metaphorical punch. also imagine that you are next to an alien that you know can kill you in second and look disgusting but he can't and will not attack you you.....image