Why did you remove so many ores? I was looking forward to playing a game with 83 ores

There are several reasons for this.
1) The generation of the map takes many times longer, which negatively affects weak devices.
2) Balancing so many ores and creating their processing will take even more time.
That's why I left so many ores. But they will still be supplemented, since I took the most basic minerals, most of which are metals. And there are many substances in the world that are not metals. So, it's just a matter of time.

Ok

Plus, recycling them would create a huge excess...

Some mod developers try to work around the map generation issue by having random ores spawn from an entity (Think Space Exploration Core Drills for example). Some others use a conversion method, where just putting i.e. iron ore in an assembly machine with a recipe to change it from iron to whatever else ore you'd want.

The latter method is a much less unrealistic method to do it, but makes the mod 100% compatible with a vanilla generated map. I suppose Space Exploration can force regen of the surface to spawn the Core Seams, but that'd give a side effect of regenerating all ores on the map as well.

That's the problem. The problem of balance. That's why I want to focus on options closer to the vanilla game, but with a sprinkling of realism.