I think we're just going to have to be satisfied with the current home video releases.
I'm honestly not sure we'll ever see HD versions of The Next Generation, Deep Space Nine or Voyager. The images are just to soft and fuzzy
While watching a first season episode of VOY some of the closeups were just out of focus. Not via diffusion but out of focus! You can't restore that. With the hectic pace of TV they just let things go if it's good enough
for broadcast (at the time in standard definition).