For games things are all about performance. As you know in a lot of cases all of the model would actualy be textured using parts from the same texture. This also speeds things up by having less textures being swapped. S3D has always been pretty lax in these things but as we try and speed things up we need to make some small changes.
We should also probably make developers provide a low/med/high rez versions of all the models so the LOD can work but perhaps later.