Sure. Open a feature request on GitHub?
I’m not sure if you are asking for a feature. There is already a way to save a GLB from the sandbox using the inspector.
That said, the loading of a glTF into Babylon Sandbox and exporting it back out is inherently a lossy step. Babylon doesn’t keep all the information from a glTF when loaded since it isn’t able to represent exactly what glTF files do, so this kind of process may not be the best. glTF is intended as the last mile format.