Coming very soon is:
- Copy & Paste: e.g. delete a tree and fill the hole with a copied patch of grass
- Color Adjustments: tinting, brightness, etc.
If these aren't editing ops, I don't know what is. :) Sure, you _could_ go back and recapture photogrammetry or rerun training, but that's super costly in terms of time. SuperSplat lets you make simple edits quickly and easily.
In theory if you delete something you have to recompute global illumination and remove cast shadows in the immediate environment of the removed object, but that information is baked in the gaussian splats. I think that's the kind of limitation the parent comment is talking about.
To be as accurate as possible, yes, you need to consider lighting/shadows. But trust me, in many circumstances, you can copy+paste gaussians and it looks 'good enough'. It depends on the scene and the edit you want to make.