I absolutely despise the "Haunted Mansion Holiday is done well" argument.
The real Haunted Mansion is so well done, of course the overlay is going to be 'good'. Of course, the over abundance of decorations, excessive lighting that destroys the feel of the corridor of doors, and weird version of 'What's this' that blasts throughout the graveyard all severely detract from the Mansion in my opinion.
The original relied on illusions, experiential storytelling, and visual gags to create a quality experience. HMH relies on a "More = Better" approach that detracts from the original experience.
It's also why Hyperspace Mountain is popular. Space Mountain is such an amazing ride, of course a few projections, cardboard cutouts, and new score will be fun. But as a Space roller coaster, it's trash- especially since many of the added effects illuminate the track killing the illusion, and the hyperspace sequence isn't at all convincing- and as a Star Wars coaster, it's also trash. It's literally the worst of both worlds.
The only overlay I think could be argued is better than the original is small world holiday, since the themes of Christmas do really well with the art style and message of the original attraction. The Christmas decorations are tastefully implemented to enhance and bring out the nuances of the small world ride and facade, instead of trying to be garish and overbearing like HMH. I still prefer the original, but small world holiday is a nice treat to get to experience whenever I'm down there for Christmas.