In the near future you can't expect functionality like this from us. First we need to solve other problem of Phex. It might take a while until the next big release comes out. But there might be a bug fix release soon with a couple of smaller enhancements.

If the GDF community finally comes up with a specification for segmented download we will integrate it ASAP. Otherwise it will take some time until we will come up with our own solution. But like we already know this might not suit everybody on the network and of the community right away.