Just because a video master has too much EE, it doesn't mean it needs an extensive digital restoration. It needs a proper remaster. Most likely, it was added during the conversion from 1080p to NTSC. The first Pirates of the Caribbean film has a huge amount of EE on the standard DVD. Does this mean it needs a full LDI restoration? Of course not. The BluRay version looks fantastic, yet it's from the same source as the DVD (the 2K digital intermediate).
MGM really didn't have to hand over any of the post-1995 films to LDI since they just needed routine HD remasters. There's a big difference between a 1962 film that has been in mediocre care for 40 years and relatively new film like Generations.