There is a patch to convert D2:ED + FoV to DKS, not officially released yet, but available (or at least was) if you email support (see Looking for testers for FOV2DKS patch). Many of the graphics updates in DKS are included in FoV, as well.

I don't know if or when a patch just for D2:ED may be released (at one point someone from Larian said the missing text in the North American release with Keara's statues would be fixed in 'the next patch', but that has yet to materialize).