I doubt that we will see this happen in the near future - if ever.
If I’m not mistaken then Crate has always operated on a budget, using a licensed engine that they can’t simply develop further by themselves, be it because of licensing issues, be it because of a lack of coders, be it because of both or of something completely different.
Changes to the fundamental architecture of a system like the multiplayer functionality would potentially have to reach such an extent that Crate might not be able to make them happen.
Then again there have been quite some complaints regarding this topic, and I guess that Crate knows that they would profit more from friends recommending GD to their friends if GD would provide more solid multiplayer functionality, so that those friends could actually play together without too much hassle.
So who knows, maybe they will resolve these issues some day after all.