Hello
At the moment, I'm not a supporter of AI. I do everything really manually. But I've had this idea for different versions in the past, that I use some filters to remove the micro details. To make it flat, but even with that, various problems arise, such as tilesets, it could be done that way but definitely not A1,A2,A3,A4,A5 tileset where it is so much a problems that it is better to create new ones :)
The worst are A1, A2, A3, A4, A5, where you have to create infinity textures, so I scrapped that idea. Because from the point of view of the time I put into it, it's not worth it at all
:)