To be quite honest, I am surprised there haven't been a string of DLC releases of generator parts for VXA or MV, as it seems like a no-brainer for paid little DLCs (i.e. tilesets and music are dime-a-dozen, but generator parts take a lot of work to make, aren't popular to make, yet allow total beginners to create new stuff with ease and are best if adhering to the original official style so they match what already exists).
This is not meant to be negative but an explanation
If you're an artist, you would understand why almost
nobody enjoys making generator parts. Everything has to be compatible and natural things/organic things don't tend to follow a rigid pattern. It might work for this body type but it certainly won't work on another body type. There's alot of modular experimentation involved and that is time consuming. The end result ends up looking 'fake' or 'plastic.' For an artist this is really disconcerting.
Add insult to injury is drawing in
another artist's style if they don't even like it in the first place OR
not using a style you developed for years. All artists have 'bad habits' and if you work with another artist's style that tend to have certain bad habits, you too, will also gain this bad habit. And it's not a very easy thing to remove. And one of them happens to be anatomy, color theory and so on. For example, RMMV's color palette is really, really bright with very little contrast or HSL variation (aka monochrome shades). Especially if you compare it with RMVX/VXA art style. Here's a visual example as to how color variation adds depth:
While it makes sense for Generator purposes (Especially since MV uses gradient mapping), this is problematic for some of us that do value knowledge we retained for years. Mass producing that kind of art style will eventually start taking a toll on your artistic abilities and sensibilities.
Imagine it like this, you have perfect English, but you spent a day or worse a week talking with people who would pronounce Fs with Ps. You will notice eventually it will start bothering you and you will start adapting that issue too. It's almost the exact thing with art except make it have some form of permanency. Everytime you pick colors now, your knowledge defaults as to how RMMV did it because you mass produced over 100 parts for it. What great practice you had before disappeared and now you have to spend the same amount of time, if not more, to recover that sensibility.
If you're not an artist or don't really care about these things and/or just want to make a game, it might not be a problem to just keeping edits and whatnot. But for content creators, it's a risk and a struggle.