Now that I think of it, a LoD HD remaster wouldn't fix most of the more intrinsic problems the game has, but mapping controls to a more modern controller and unfuzzying the graphics and textures would go a long way to handling at least some of them.
That said, it's an under-appreciated game, and knocking it in with other games would be good for the series, I think.
I am also in favor of packaging SCIV, Legacy, and Lament, all in HD textures as a single set.