As for Mike, kid's twelve. I can see him having some talent and training, but he's also the son of two parents who probably wouldn't shovel Magecraft down his throat. With how you're describing him, it's almost like he's Rin's kid that Rin has been pushing kind of hard.
I'm honestly not sure how that impression came across from it. I've not made him out to be particularly powerful, he's just vaguely competent and learning to be better.
As for his training, though, it's not so much they've been pushing him as it is he's been pushing
himself, and they've just supported him in that.
His personality and stuff seems fine, and I like the idea that he has a Shadow pet that Sakura made for him. Maybe just tone him down powerlevel wise a little.
The thing is, I honestly don't see what in the profile makes him out to be particularly powerful. I already explained that the stats are in comparison to other people of the same age and not to adults.
So, what do I need to change for it?
I'm pretty sure that Sakura and Shirou would want their kids to be well kids instead going intensive magus training.
Yeah, definitely, the well-being of their kids is their sole worry, not whether they become good magi.
As for Shirou and Sakura's son, as Elf said, Shirou and Sakura aren't exactly going to go all gung ho on teaching their son the ins and outs of magecraft. They may teach him the basics, but he's not going to be at the same level Rin would be at the same age, and even 11 year old Rin would probably need some form of backup.
Well, they wouldn't
force it on him, no, but if he wants to learn they wouldn't refuse to teach him, either.
An 11 year old is capable of fighting, yes, but the only way they're going to stand a chance against a competent, combat savvy adult or even a combat savy teenager on their own is if they are overpowered to begin with, or if they've had frequent, intense combat training from a very young age, something I think that's borderline for even Rin to push for. So he'd be able to do backup, but for the most part he's going to have to rely on Mom and Dad and Auntie Rider to make sure he doesn't get hurt.
Well, it depends. He could take on a mundane adult no problem, but I agree he's not likely to do much against most competent magi or more serious threats. He can defend himself to a certain extent, but he's definitely going to need Sakura, Shirou and Rider to protect him.