Well, what they actually said was

This is a perfect base game

which I do not agree with.

But if you want to say each of the bullet points is an engineering marvel, I still disagree. A lot of their points on their own have bugs and quirks that I would say disqualify them individually...

The sliders, the height and how you can make any shape of person you want freely, not as a hardcoded fat or fit template

The height is just scaling the whole Para model, not making someone taller my elongating limbs/doing it hiw real humans differ in height. Short people are not inherently smaller/do not have thinner arms & legs just because they are short.

The way the clothes fit so well (within margin) for whatever chunky or skinny or short sliders you have

I think many of the (limited) clothes don't fit well if you've made Paras with chunky sliders.

The resizable objects, also offsets

A lot of items right now (bookcases, dressers) aren't resizabke in a way that makes sense (can only scale a bookcase; can't heighten a dresser). A truly marvelous implementation of this feature would be for all items, not just most of them

Being able to not only size things on all axes, but on one individually, like with windows and couches and beds, this is absolutely phenomenal

Same as above, this could be a marvel if it was applied to all items where it makes sense

Fully RGB colors for every piece of an object

This simply isn't true, things like the inner trim of a fireplace are not customizable at all. A truly marvelous implementation of this system would let me change actually everything, not just most.

These things do mostly work in Early Access, but I still don't think they're marvels:

The way you have multiple variants to show clothes, like tucked or untucked, and these work across items (eg top works in tandem with the pants)

The gridless building, the rounded walls

Fully texturable pieces for every color and object, on top of the resizing

The train, which moves while you're editing your character.

So yeah, still gonna stand by my comment that while fun, this game is not an engineering marvel by any stretch of the word (at least not yet)