Why suggest it when you can just do it? Create an alternative version and upload it to the forum; the Mount and Blade modding community does this, and these mods are called "submods." Sometimes, this results in truly amazing projects like TLD and TLD Overhaul – the first focuses on the scenario, while the second adds armor in the style of the movies on top of the TLD mod.
If that's possible, then no problem. I come from the Skyrim modding scene, and there, to upload a mod with any changes, you need to get not only the author's permission but also the permission of everyone involved in creating the mod's assets.
