The road is set to be inscribed either this year or the upcoming ones. I am not surprised it gets an inscription due to the abundance of butterflies in the region.

There was one stop to see many of those but the other stops were closed. They also looked like needing a lot of refurbishing. Thus the main stop for the crowds is the glacier and they provide ample free parking. With proper equipment you can even hike to the glacier and back. One look at the howling tunnel and you will not want to hike there ;)

As much as I think glaciers are in need of protection, and there are already several on the world heritage list including its Swiss neighbour, I don't find adding another unique. In combination with the "natural beauty" and flora/fauna it is more of a nice bonus.

Pro tip: check what brochure they give you at the entrance as they gave me based on the rental car license plate so that's not very useful...I'm surprised they even had Hungarian!