My kids are both autistic, and have ADHD. Primary aged.
I do present piles, probably 20+, plus big stockings and they bloody well love it! Overstimulated at Christmas? By guests and Christmas cracker bangs certainly. By a present pile? Not a chance.
I jest, I know lots of ND children can indeed find presents/opening them all challenging.
I make no apologies for spoiling my children at Christmas. Our lives are bloody hard. I'm also ND and disabled. They both have SEND and need a lot of extra help at school it's a struggle. DH works his backside off. We cope with a lot, just to get by in the world every day.
We can afford it. We donate gifts and selection boxes to the food bank to help families in need and we then go a little bit mad giving the children a morning of excitement and wonder.
That list sounds like the most dull thing I've ever heard of at Christmas. Bah humbug, what a load of rot!
Do what suits your circumstances, never mind anyone else.